How do I determine the ideal harness size for my dog?

  1. Why Choosing the Right Harness is Important for Your Dog

Comfort and well-being of your dog
A properly fitted harness ensures that your dog is comfortable while walking or running. A harness that doesn't fit properly can create unpleasant pressure points, limit their freedom of movement, and even cause pain in the long run. A comfortable dog will be more relaxed, less stressed, and their walk will be an enjoyable experience for both them and you. This is especially important for smaller dogs, who may be sensitive to rubbing or pressure on their rib cage.

Better control and security
Choosing the right size and shape of harness allows you to better control your dog without pulling directly on his neck, which could cause serious injury. Collars, in particular, can cause breathing problems or injuries in small breeds or dogs that pull hard on the leash. A good harness distributes the pressure across your dog's entire body, preventing injury. It also makes it easier to prevent your dog from escaping, a common problem with poorly fitting harnesses.

Responding to breed specific needs
Different breeds have specific needs when it comes to choosing a harness. For example, short-nosed dogs, like French bulldogs, may have trouble breathing in a collar, and a properly fitted harness helps alleviate that pressure. Long dog breeds, like dachshunds, need harnesses that don't put undue pressure on their backs. Understanding your dog's specific needs will help ensure they are comfortable and safe.

Support for older or injured dogs
A good harness is essential for senior dogs or those recovering from injuries. A proper model can help distribute weight evenly and support dogs with arthritis, hip dysplasia, or other physical issues. Harnesses with built-in handles even make it easy to gently lift your dog without causing pain.

  1. The risks of an ill-fitting harness

Potential health problems
A poorly fitted harness can create pressure points on certain parts of your dog’s body, which can lead to chronic pain and long-term injuries. If the harness is too tight, it can cut off blood circulation, damage the skin, and even lead to irritation or infection from constant rubbing. Additionally, poorly fitted harnesses around the neck can put pressure on your dog’s windpipe, which could cause breathing problems or throat injuries, especially in sensitive breeds.

Movement restrictions
A harness that is too small or poorly designed can restrict your dog's natural movements, which can lead to muscle and joint strain and even lameness. For example, a harness that fits too tightly around the shoulders will limit the full extension of the front legs, disrupting your dog's normal gait. In the long term, this can lead to joint pain or inflammation.

Risk of injury or escape
A harness that is too loose also presents dangers. If the harness is not properly fitted, your dog could easily escape, especially if he is agitated or anxious during walks. A dog that escapes near a road or in a busy area could quickly find himself in danger. Additionally, an ill-fitting harness that is constantly slipping or moving can cause chafing and irritation on the skin, creating sores or hot spots.

Difficulty in training and walking
If the harness is not properly fitted, your dog may become reluctant to walk or train properly. Constant discomfort can lead to resistance behavior, where the dog pulls more or tries to get out of the harness. This not only makes walks more difficult, but it also makes training more difficult because the dog associates the harness with a negative experience.

  1. Quick overview of harness types and their impact

Y-Harness (or Front Clip Harness)
The Y-harness is designed to provide optimal control, especially for dogs that often pull on the leash. It has an attachment point located at the front, at chest level, which redirects the pulling force laterally rather than in a straight line. This type of harness is ideal for training your dog not to pull, as it reduces the force exerted forward. On the other hand, it is essential that it fits well, otherwise it can slide to the side and hinder the animal's movements.

H-Harness (or Back Clip Harness)
The H-harness, also called a back-clip harness, is one of the most popular for daily walks. It allows for a leash attachment on the back, making it easy and comfortable to use for dogs that don't pull. This type of harness distributes pressure well across the body and is suitable for most dogs, especially those that are calm on walks. However, it may not be as effective at correcting leash pulling behaviors.

T-Harness (or Chest Harness)
The T-harness is often not recommended because it can hinder the freedom of movement of the front legs. Unlike the Y or H harness, it rests directly on the dog's chest, which can limit the extension of the front legs and create muscle tension in the long term. This type of harness is more restrictive and is rarely suitable for very active dogs. This is a point to emphasize when choosing, because although this model is still sold, it is often less ergonomic.

Puppy harnesses
Puppy harnesses are usually lighter and adjustable to accommodate their rapid growth. They are often made with soft materials to avoid hurting puppies' delicate skin. However, it is crucial to regularly reassess the size of the harness as the puppy grows, to avoid it becoming too tight or uncomfortable.

Anti-pull harness
For dogs that are constantly pulling, a no-pull harness can be a great solution. It distributes the force in a way that prevents the animal from pulling while maintaining good control. The main drawback is that these harnesses must be adjusted precisely, otherwise they can quickly become uncomfortable or ineffective.

4. Factors to consider when choosing harness size

When it comes to choosing the right harness for your dog, there are several factors that come into play to ensure the harness fits properly and is comfortable. In addition to specific measurements like chest and neck circumference, other factors that influence the size and type of harness you choose include your dog's weight, breed, body shape, and age. Here's a closer look at these factors.

4.1. Your dog's weight

Why is weight important?
Your dog's weight is often used as a first reference when choosing a harness size. Most harness manufacturers provide recommendations based on weight ranges, as this is a general indicator of a dog's body size. A heavier dog will need a sturdier harness, with wider straps and strong attachment points to distribute pressure without causing discomfort or injury. On the other hand, a smaller dog will need a lighter, less bulky harness so that it doesn't get in the way of its movements.

Influence of weight on harness type
A lightweight dog, like a Chihuahua or Yorkie, might benefit from an H or Y harness made with soft, thin materials so as not to weigh down the body. Conversely, heavier dogs, like Labradors or German Shepherds, need a harness with wider, more padded, and often reinforced straps to ensure it doesn't come loose or cause discomfort during more intense physical activities.

Weight isn't everything
Although weight is an important indicator, it should not be the only criterion to consider. Some dogs may be heavy but have a compact morphology (for example, a bulldog), while others may be lighter but long and muscular (like a greyhound). Weight should therefore always be considered alongside other factors when choosing the ideal harness size.

4.2. The breed and morphology of the dog

Breed-specific morphology
Each dog breed has unique physical characteristics that influence the choice of harness size and type. Some breeds have long, narrow bodies, such as greyhounds, while others have broad, muscular chests, such as boxers or bulldogs. A properly fitted harness should accommodate these characteristics to provide optimal comfort and safety.

  • Broad-chested breeds : Dogs like French or American bulldogs often have broad, deep chests. A harness with a wider fit across the chest is therefore necessary to avoid creating uncomfortable pressure on this area.
  • Long-bodied breeds : Dachshunds and other long-bodied breeds need a harness that won't strain their backs or pull too much on their front legs. A well-fitting Y or H harness will help distribute pressure evenly.
  • Short-nosed (brachycephalic) breeds : Dogs like pugs or bulldogs often have breathing problems, and a collar could make these problems worse. For these breeds, a harness that reduces pressure on the throat and provides good support is essential.

Specific adjustment according to morphology
Harnesses should not only fit the dog's overall size, but also their specific body shape. For example, a dog with a large chest but a narrow neck might need a harness that is adjustable in multiple areas, such as the chest and neck, to ensure it fits snugly without causing discomfort to the dog.

Athletic and energetic dogs
Highly active dogs like border collies, German shepherds, or terriers often need a harness designed for mobility. It should be flexible enough to allow a wide range of motion, while still staying securely in place. A poorly fitting harness could restrict these movements or cause chafing during physical activities.

4.3. The dog's age and growth stage

Puppies: The Importance of Adjustability
When buying a harness for a puppy, it is essential to consider their growth stage. Puppies grow quickly, so it is important to choose an adjustable harness that can accommodate their development. A harness that is too small or not adjustable will quickly become uncomfortable and unusable. It is advisable to measure your puppy regularly to adjust the harness as they grow and, if necessary, change sizes as they go.

Evolutionary harnesses for puppies
Some harnesses are designed to be scalable and adjustable at multiple points. These allow owners to adjust the size as their dog grows. This can be a cost-effective and practical solution, especially during the rapid growth phase of the first few weeks or months.

Adult dogs: stability and comfort
Once your dog has reached adulthood, their size and shape are more stable. You can then invest in a high-quality harness, designed to last longer and provide optimal comfort during walks or physical activities. Adult dogs often have specific needs depending on their energy level and lifestyle, whether it's a no-pull harness for energetic dogs or a lightweight harness for calmer dogs.

Older Dogs: Support and Safety
Older dogs, on the other hand, sometimes have different needs. They may suffer from joint pain, limited mobility, or health issues like arthritis. In this case, a harness that offers extra support is crucial. A model with built-in handles, for example, allows owners to help their dog climb stairs or get out of the car. It should also be softer and more padded to avoid irritating the fragile skin of older dogs.

In short, choosing the right harness size is not just about a single measurement. Your dog's weight, breed, body shape, and age are all crucial factors that determine the type and size of harness you should choose to ensure comfort, safety, and freedom of movement. A well-fitting harness not only protects your dog from injury, but also ensures a stress-free and enjoyable walking experience.

  1. Steps to Measure Your Dog Correctly

Measuring your dog correctly is essential to ensure the harness fits perfectly, ensuring comfort and safety. Improper measurement can result in a harness that is too tight or too loose, causing discomfort or putting your dog at risk. Here are the detailed steps to measure the main areas of your dog's body and choose the right harness size.

Tools needed

Before you begin, make sure you have the right tools:

  • A soft tape measure (used in sewing) or a flexible measuring tape.
  • A pen and paper to record measurements.
  • An assistant, if possible, to help you hold the dog in place while you take the measurements, especially if your dog is very energetic.

5.1. Chest circumference measurement

Why is chest measurement important?
Chest girth is one of the most crucial measurements when choosing a harness size. This measurement ensures that the harness fits snugly around your dog’s torso, where the majority of the weight and pressure will be distributed. A harness that is too tight in this area could interfere with breathing or create uncomfortable pressure points, while a harness that is too loose could slip and become ineffective.

How to measure your dog's chest circumference:

  1. Position your dog correctly : Have your dog stand on a flat, stable surface. It is important that your dog is in a natural position, not sitting or lying down, to get accurate measurements. If possible, have someone gently hold your dog in place.
  2. Locate the area to be measured : The chest circumference should be measured at the widest part of your dog's torso, usually just behind his front legs. This is where the ribcage is widest.
  3. Using the tape measure : Wrap the tape measure around your dog's chest, just behind his front legs and over his back. Make sure the tape measure is snug, but not too tight. It should be flat against your dog's body, without bunching or being too loose.
  4. Note the measurement : Once you have taken the measurement, write it down immediately to avoid forgetting it. It is recommended to add about 2 to 3 cm to leave room, because the harness must be snug enough not to slip, but not too tight to interfere with breathing or comfort.

Additional tips:

  • If your dog has thick fur, make sure the tape measure is placed against the skin and not over the fur.
  • If your dog is between harness sizes, it is often best to choose the larger size, as you will still be able to adjust the harness to make it tighter.
  • Once you have the measurement, it is recommended to add a few inches (usually 1-2cm) to ensure a comfortable fit.
  • If you have a puppy, keep in mind that he will grow quickly. Be sure to check the neck measurements regularly to adjust the harness accordingly.
  • For dogs with dense or thick fur, take the thickness of the fur into account when taking the measurement.

5.2. Neck circumference measurement

Why is neck circumference measurement important?
While most harnesses don't put pressure on the neck like collars do, it's still important to measure this area to ensure the harness isn't too tight around your dog's neck, which could cause irritation or breathing difficulties, especially for brachycephalic (short-nosed) breeds. Proper measurement also helps prevent chafing at the nape of the neck and ensures a proper fit of the harness's top straps.

How to measure your dog's neck circumference:

  1. Position your dog correctly : As with chest measurement, your dog should be standing in a natural position. Keep him relaxed and calm to get accurate measurements.
  2. Locate the area to be measured : Measure around the base of the neck, where the neck meets the shoulders. This is usually the widest part of the neck. Avoid measuring too close to the head, as this may cause the harness to be incorrectly sized.
  3. Use the tape measure : Wrap the tape measure around the base of your dog's neck. Make sure it is snug, but not tight. It should be loose enough that you can insert two fingers between the tape and your dog's neck, which is a good rule of thumb to avoid making the harness too tight.
  4. Note the measurement : Once you have the measurement, write it down immediately. Again, it is recommended to add a few inches (usually 1-2 cm) to ensure a comfortable fit.

Additional tips:

  • If you have a puppy, keep in mind that he will grow quickly. Be sure to check the neck measurements regularly to adjust the harness accordingly.
  • For dogs with dense or thick fur, consider the thickness of the fur

5.3. Other additional measures to be taken into account


While this measurement isn't always necessary for all types of harnesses, it's helpful to ensure the harness doesn't rub on sensitive areas, such as the back or stomach. This is especially relevant for harnesses that cover a large portion of the back or are used for more intense activities.

How to measure back length:

  1. Measure from the base of the neck : Place the tape measure at the base of your dog's neck, where the spine begins, and extend it to the base of the tail.
  2. Note the measurement : This measurement will help you choose a harness that does not extend too far back or is too short, causing imbalance.

Front leg circumference

Why might this measure be important?
For dogs with particularly muscular or wide legs, such as Boxers, or for dogs with particular sensitivities around the legs, it may be helpful to take a measurement around the front leg joint. This will ensure that the harness does not squeeze or rub in this area.

How to measure front leg circumference:

  1. Circle the front leg joint
    Wrap the tape measure around the front leg joint, just above the shoulder. This will help you choose a harness that won't squeeze this area, especially if you opt for a Y-shaped model that goes between the front legs.

Dog weight

Why is weight an important factor?
While not a direct physical measurement, many harness manufacturers recommend sizes based on weight. Your dog's weight can be a good indicator, especially if your dog has a specific body type (e.g., a compact but heavy body). Combining weight with measurements will give you a better idea of ​​what size harness to choose.

Practical tips for taking measurements:

  • Be patient : Some dogs may be nervous or restless. Take your time and try to calm them down by giving them treats or praise while you measure them.
  • Check regularly : If you have a puppy, his measurements will change quickly. Remember to check the measurements regularly to adjust or replace the harness as he grows.
  • Use an adjustable harness : Adjustable harnesses are often a great choice because they allow for adjustments to be made as your dog's body changes.

These detailed steps help you measure your dog correctly to ensure a perfect harness fit. Accurate measurements not only contribute to comfort, but also to your dog's safety during walks and daily activities. Be sure to follow these tips and adjust the harness regularly so your companion can enjoy it to the fullest without discomfort.

  1. The fit test after measurements

After taking all the necessary measurements and purchasing a harness accordingly, it is essential to check its fit on your dog to ensure that it is comfortable and secure.

Two Finger Test
Once the harness is placed on your dog, do the two-finger test by trying to slide two fingers between the harness and the dog's skin. This test ensures that the harness is neither too tight nor too loose.

Check freedom of movement
Make sure your dog can move freely, especially his front legs, and that there is no excessive rubbing or pressure areas around the armpits, neck or chest.

Observe your dog's behavior
If your dog is uncomfortable, scratches, or tries to free himself from the harness, it is likely that the harness is not properly fitted or the right size. In this case, readjust the straps or consider a different size.

Here are some signs that your dog's harness is not properly fitted:

A poorly fitting harness can negatively impact your dog's health, comfort, and behavior. It's important to watch for signs of discomfort or irritation when your dog is wearing their harness. A poor fit can lead to behavioral problems and long-term injuries. Here are some of the main signs to look out for.

6.1. Rubbing marks or skin irritation

Why is this a problem?
Chafing or irritation is one of the most visible signs of a poorly fitting harness. It usually occurs when the harness is too tight or parts of the harness, such as the straps, are putting continuous pressure on the skin. If the harness rubs against your dog's armpits, chest, or neck, it can cause redness, hair loss, or even sores.

Where to check for chafing or irritation:

  • Underarms : This is one of the most sensitive areas, as this is where the harness straps often pass. If the harness is too tight or ill-fitting, it can rub against the delicate skin in this area.
  • Around the neck and chest : If the harness is too tight around the chest or neck, redness or shed hair may occur. Watch for signs of chafing, especially if your dog wears the harness for long periods of time.
  • Around the front legs : Some straps can cause rubbing around the front leg joints if not fitted properly.

Solutions:

  • Adjust the straps : Check that you can fit two fingers between the harness and your dog's skin at each contact point. If the harness is too tight, loosen the straps slightly.
  • Choose a more padded harness : Harnesses with padding around sensitive areas, such as under the arms and on the chest, can help prevent rubbing and irritation.

6.2. Discomfort behavior or refusal to walk

Why is this an important sign?
Dogs communicate discomfort or stress through their behavior. If your dog refuses to walk or seems hesitant to move when you put his harness on, this is a clear indicator that something is wrong. This behavior may also include attempts to remove the harness, excessive scratching, or refusal to participate in usual activities like walks.

Behaviors to watch for:

  • Attempts to remove the harness : If your dog is constantly trying to scratch or pull the harness with his teeth, it's probably a sign that he's finding it uncomfortable. This could be due to excessive pressure, poorly positioned straps, or areas that cause friction.
  • Refusal to Walk : If your dog freezes or refuses to walk as soon as you put the harness on, it may be a sign that the harness is not properly fitted. A harness that is too tight can hinder natural movement, while a harness that is too loose can feel awkward or uncomfortable.
  • Behavioral changes on walks : A dog that usually enjoys walks, but suddenly becomes reluctant or stressed when wearing his harness, may signal a fit problem.

Solutions:

  • Check the size and fit : Make sure the harness is neither too tight nor too loose, and that it allows your dog to move freely. Every dog ​​is unique, and a poorly designed or ill-fitting harness can hinder their ability to walk or run comfortably.
  • Take regular breaks : If your dog wears his harness for long periods of time, be sure to provide rest periods where he can be without the harness, especially on long or intense walks.

6.3. Harness that turns or slips when walking

Why is this a sign of poor fit?
If the harness slips, twists, or moves excessively during walks, it's a sign that it's too loose or ill-fitting. This can cause uneven pressure distribution and make the harness ineffective at controlling or guiding your dog. Additionally, a harness that constantly slips can irritate your dog's skin and cause chafing in unexpected areas.

Signs to watch for:

  • Harness twists to the side : When the harness twists excessively on your dog's body, it becomes less effective for control, and parts of the harness can rub against sensitive areas like the ribs or armpits.
  • Harness rides too high on the neck : A harness that slides up on the neck can put pressure on the throat, especially during walks where the leash is tight. This can cause discomfort or even breathing difficulties in some dogs.
  • Harness Slips Down : If the harness slides backward on your dog's back, it loses its primary function of support and control. This type of slippage often indicates that the straps are too loose or that the harness is not shaped to fit your dog.

Solutions:

  • Adjust the straps for a better fit : Make sure the straps are snug, but not so tight that they interfere with your dog's breathing or movement. There should be just enough room to insert two fingers between the harness and the skin.
  • Choose a harness with multiple adjustment points : Some harnesses offer multiple adjustment points (around the neck, chest, and sometimes belly), which helps to better fit the harness to your dog's unique body shape. This also helps distribute pressure more evenly.

6.4. Other signs of an ill-fitting harness

In addition to chafing, refusal to walk, and harnesses that slip, there are other signs to look for that may indicate your dog's harness is not fitting properly:

  • Difficulty breathing : If the harness puts pressure on your dog's chest or neck, it may make it harder for him to breathe. Watch for excessive panting or any signs of respiratory distress during or after the walk.
  • Skin rubbing against metal clips : Some metal buckles or plastic clips can irritate the skin if they are not properly positioned or protected. If you notice your dog scratching around these areas, check to see if they are rubbing directly against his skin.
  • Limited Front Leg Movement : A poorly fitting harness can restrict the natural movement of the front legs, especially if the straps run too close to the joints or armpits. This can cause discomfort and alter your dog's natural gait.

7-How to get your dog used to wearing a no-pull harness?

Introducing your dog to a no-pull harness can take some time and patience, especially if your dog is not used to wearing a harness or has had uncomfortable experiences with other walking gear in the past. Here's a step-by-step approach and some helpful tips to help your dog adjust without stress.

7.1. Introduce the harness to your dog in a positive way

Before putting on the harness, it is essential that your dog associates this object with a pleasant experience. Here are some steps to get started:

7.1.1. Let him explore the harness

Let your dog sniff and examine the harness at his own pace. Don't rush this phase, as it allows your dog to become familiar with the object without feeling threatened.

  • Tip : Place the harness on the floor and reward him with treats every time he approaches or interacts with the harness. This reinforces a positive association.

7.1.2. Use treats or toys

Reward your dog whenever he approaches the harness or touches it with his nose. This step helps condition the dog to view the harness as a pleasant item.

  • Harness Play : You can even turn introducing the harness into a game by asking your dog to follow or touch it to receive a treat.

7.2. Introduce wearing the harness gradually

Once your dog seems comfortable with the harness, you can move on to the next step: introducing him to wearing the harness. It is crucial to go slowly to avoid creating anxiety or discomfort.

7.2.1. Wear the harness for short periods

At first, wear the harness for very short periods of time, inside the house, without attaching the leash. This allows your dog to get used to the feeling without pressure. Gradually increase the amount of time your dog wears the harness.

  • Monitoring reactions : Observe your dog carefully. If he shows any signs of discomfort (such as trying to remove the harness, scratching, rolling around), remove it after a few minutes and try again later.

7.2.2. Reward and praise

Throughout the time your dog is wearing the harness, continue to reward him with treats and petting. The goal is to reinforce the idea that wearing a harness is a pleasant and rewarding activity.

  • Use rewards at regular intervals : Every few minutes, give him a treat if he remains calm with the harness on.

7.3. Associate the harness with walks and positive activities

Once your dog seems comfortable wearing the harness indoors, it's time to associate wearing the harness with enjoyable walks outside.

7.3.1. First walks on a leash with a harness

At first, keep the first walks with the no-pull harness short and unstimulating. Choose quiet places to avoid overwhelming your dog with distractions or stressful situations.

  • Calm, controlled walks : Gently guide your dog using the harness's anti-pull mechanisms, but without pulling or forcing too much. The goal is for your dog to begin to understand the redirection effect without frustration.

7.3.2. Combine with rewards

While walking, reward your dog every time he walks calmly beside you, without pulling. This encourages him to engage in positive behavior while wearing the harness.

  • Verbal praise and encouragement : Pair treats with verbal encouragement like “good dog!” or “well done!” to reinforce good behavior.

7.3.3. Gradually extend the duration of walks

As your dog becomes comfortable with the harness on short walks, you can gradually increase the length of the walks. This allows him to adjust to the mechanics of the harness while maintaining a positive experience.

7.4. Resolving any possible reservations

Some dogs may be more reluctant to wear a harness, especially if they have had a bad experience with similar equipment in the past. Here are some solutions to the most common problems.

7.4.1. Comfort issues

If your dog shows signs of discomfort or resistance, make sure the harness is properly fitted. A harness that is too tight or poorly positioned can irritate the skin or restrict movement.

  • Proper fit : Make sure you can fit two fingers between the harness and your dog's body. If the harness is too tight, it could interfere with breathing or restrict movement.
  • Padding : If your dog has sensitive skin, look for harnesses with padded areas or made from soft materials like neoprene.

7.4.2. Fearful or anxious behavior

For anxious dogs, introducing the harness may take longer. In this case, it is important to proceed in stages and remain patient.

  • Using Desensitization : If your dog seems fearful, try putting the harness on him several times a day for short periods of time at home, gradually increasing the amount of time he wears it.
  • Reinforced positive reinforcement : Increase the frequency of rewards for each step, even if they are small, such as simply letting the harness rest on his back without fastening the straps.

7.4.3. Reluctance to put on the harness

Some dogs may become reluctant to even put on a harness, especially if it requires them to put their head through a loop or lift their legs. In this case, try to associate putting on the harness with positive experiences.

  • "Head Through" Game : Turn the act of putting on the harness into a game. Show the harness, then encourage your dog to put his head through the opening, rewarding him generously each time he does so.
  • Gradual habituation technique : Start by putting the harness on without attaching it, then gradually attach it as he gets used to the sensation.

7.5. Make wearing the harness part of the daily routine

To help your dog permanently accept the harness, it is important to integrate it into his daily routine.

7.5.1. Wear the harness at quiet times

Encourage your dog to wear the harness even outside of walks, for example during quiet times at home. This helps to desensitize the dog to the harness and accept it as a normal part of his daily life.

7.5.2. Associating the harness with pleasant moments

Put the harness on just before activities your dog enjoys, such as playing, cuddling, or giving treats. This will help him associate the harness with positive moments.

In conclusion

A poorly fitting harness can not only make walks uncomfortable for your dog, but can also cause long-term injuries. By paying attention to signs like chafing, behavioral changes, and harness slippage, you can quickly correct problems and ensure your dog is comfortable and safe. A properly fitted harness should allow your dog to move freely without discomfort or excessive pressure, while still giving you the control you need during walks.

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