How to get your dog used to a harness, part 2: mistakes to avoid and expert tips for habituation
Updated 14 October 2026
In short: the mistakes that make dogs hate the harness are nearly always the same: forcing the dog, scolding it, rushing, giving rewards that are too small or too late, and choosing a badly fitted harness. The fix: stay below the dog's stress threshold, reward each small step within a second, and check the size and fit. This article follows on from the 4-step method.
6 mistakes that make dogs hate the harness
Forcing or cornering the dog
Holding it down to put the harness on creates a lasting bad association. Every step must be voluntary.
Scolding when it resists
It learns that the harness means trouble. End the session and go back to the step where it was comfortable.
Rushing
Going from "I'm sniffing it" to "we're out for 30 minutes" in one day. Five 3-minute sessions beat one 15-minute session.
Rewarding too little or too late
A kibble given 10 seconds later is useless. You need a treat it loves, at the right moment.
A badly fitted harness
If it squeezes or rubs in the armpits, the dog is right to dislike it. Check the size first.
Only using it for vet trips
If the harness mostly means unpleasant outings, it becomes a bad signal. Link it to walks first.
Using positive reinforcement well
Positive reinforcement means rewarding the behaviour you want to see again. It's the method recommended by veterinary behaviour associations, which advise against punishment-based methods. For the harness, that means:
- Choose a high-value rewardSmall pieces of cooked chicken, cheese or a treat it only gets for this. See which treats to give.
- Reward at the right momentWithin a second of the right behaviour. A marker word like "Yes!" said at the exact moment helps the dog understand what's being rewarded.
- Break it into tiny stepsLooking at the harness, sniffing it, nose in, head through… Each small step earns a reward.
- Mix it up and end on a successAlternate treats, play and fuss. Always end the session on a success, however small.
Stay below threshold: a good session is one where your dog stays relaxed from start to finish. If it shows stress signs (yawning, lip licking, turning its head away), you went too far: step back.
True or false: common myths
It'll get used to it if it wears it all day.
FALSEWorn all the time, a harness rubs and can snag. A stressed dog doesn't get used to it, it just puts up with it. Short, positive sessions work better.
A puppy gets used to it faster than an adult.
TRUEGenerally yes: the first three months are when puppies accept new things most easily. But adults learn very well too, with a bit more patience.
A dog scratching at its harness is just being difficult.
FALSEIt's signalling discomfort: too tight, rubbing in the armpits, an irritating material. Check the fit, then see a vet if the skin is red.
The whole family needs to do it the same way.
TRUEYes. If one person forces while the others reward, the dog gets confused. Agree on the steps and the marker word.
My dog refuses the harness: what now?
Put the harness away for a few days. Then start again from scratch: harness on the floor, treats around it, no attempt to put it on. It must come by itself.
Common at first. Toss a treat a metre away, play, encourage it to move. Take the harness off after a few seconds, then lengthen very gradually.
Redirect to a chew toy, keep sessions short and never leave it alone with the harness. A chewed harness can fail on a walk.
Stop straight away, without scolding: growling is a useful warning. Go back several steps and get help from a dog trainer. See when to call in a professional.
Choosing the right harness from the start
- Y shape: it keeps the throat and shoulders free. Avoid straps running across the shoulders.
- Right size: measure the chest girth with our calculator. Two flat fingers under each strap.
- Soft material: padding and a breathable lining limit rubbing.
- Easy buckles: less handling, less stress.
Our Confort Y harnesses tick all these boxes, plus a chest ring for dogs that pull.
Frequently asked questions
At what age should I get a puppy used to a harness?
As soon as it arrives, often at around 8 weeks. The first three months are when it accepts new things most easily, so make the most of it with very short sessions.
My dog flatly refuses the harness, what should I do?
Never force it. Go back to letting it discover the harness on the floor, shorten sessions and raise the value of the rewards. If nothing changes, a dog trainer can help.
How long does harness training take?
From a few days to several weeks. Consistency matters more than length: a few minutes every day.
My dog scratches in its harness, is that normal?
It's a sign of discomfort. Check the fit (two fingers under each strap, nothing in the armpits). If the skin is red or irritated, see your vet.
Can a dog wear a harness all day?
It's better to take it off after the walk: it can rub and snag. And the harness keeps its meaning of "we're going out".
My dog still pulls, even in the harness?
Clip the lead to the chest ring of an anti-pull harness and practise the Stop and Go method: stop as soon as the lead goes tight, move on when it slackens.
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