Key takeaways
- In Great Britain, a dog in a public place must wear a collar with its owner's name and address. A harness does not replace the collar.
- A harness spreads pressure across the chest and is often a better choice for dogs that pull or have sensitive necks. Ask your vet if you are unsure.
- Fit is everything: you should be able to slip two fingers under straps, and the dog should not be able to back out.
- Dogs must also be microchipped, and your details kept up to date.
In this guide
Walking a dog should be simple, but the choice between a collar and a harness gets people thinking. The short answer is that most dogs benefit from both: a collar to carry their identification, and, for many, a harness for walking.
What the law says in Great Britain
Under the Control of Dogs Order 1992, a dog in a public place must wear a collar with the owner's name and address on it or on a tag attached to it. Dogs must also be microchipped, and the details on the database need to be kept up to date. A harness is not a replacement for the collar.
When a harness is a good idea
- Dogs that pull. A harness spreads the pressure over the chest rather than the throat.
- Dogs with neck or throat sensitivity. If your dog coughs or gags on the lead, ask your vet.
- Flat-faced or small breeds. Many people prefer a harness for dogs where pressure on the neck is a concern.
- Puppies learning to walk on a lead. A comfortable harness avoids a bad first experience.
- Dogs who slip their collars. A well-fitted harness is harder to back out of.
When a collar is enough
Calm, well-trained dogs that walk on a loose lead can be fine with a flat collar and a lead. Collars are also the right place for ID tags, and are quick to put on.
Types of harness
- Back-clip: the lead attaches on the dog's back. Comfortable and simple, but it may not discourage pulling.
- Front-clip: the lead clips at the chest. Can gently turn a pulling dog towards you.
- Dual-clip: has both, so you can choose.
- Step-in and vest styles: easy to put on, good for dogs who dislike things over their head.
Getting the fit right
- Measure your dog and compare with the size chart for that brand. Sizes differ.
- Adjust the straps so you can slide two fingers between the harness and your dog.
- Check for rubbing around the armpits and behind the front legs.
- Check your dog cannot back out when you gently pull the lead.
- Recheck as they grow or change coat. Puppies outgrow harnesses quickly.
Material and safety
- Padded straps are more comfortable for dogs who walk a lot.
- Reflective strips help drivers see you on dark winter walks.
- Breathable fabric matters in warm weather.
- Quality of buckles and stitching matters for strong dogs. Read reviews about failures.
- If you use a harness in a car, look for one that is independently crash-tested for that purpose. A normal walking harness may not be.
Training matters most
A harness is a tool. For a dog that pulls, loose-lead training with rewards is the long-term answer, and a harness can make it more comfortable while you train. If you have concerns about your dog's comfort, talk to your vet.
Before you buy on Amazon UK
- Check the size chart against your own measurements.
- Read the lower-star reviews about fit, rubbing and escapes.
- Check what is included. Some harnesses are sold with a lead, others are not.
- Check the returns policy in case the fit is wrong.
Which type for which dog?
- A strong puller: a front-clip or dual-clip harness, along with loose-lead training.
- A small or flat-faced breed: a lightweight, padded harness that keeps pressure away from the neck.
- A puppy: an adjustable harness with room to grow, rechecked every few weeks.
- A dog who escapes: a well-fitted harness with a strap behind the front legs, or a design made for escape artists.
- A calm adult: a flat collar with ID, and a harness for longer walks if you prefer.
Getting your dog comfortable
- Introduce it gently. Let your dog sniff the harness and give treats.
- Put it on for short periods at home before a walk.
- Check the fit each time, especially after grooming or weight changes.
- Never leave a harness on unattended, because straps can snag.
- Wash it regularly according to the care label.
A short glossary
- Back-clip: the lead clips at the dog's back.
- Front-clip: the lead clips at the chest, which can reduce pulling.
- Step-in harness: your dog steps into it rather than wearing it over the head.
- Reflective trim: material that shines in headlights.
- Microchip: a small chip under the skin that links your dog to your details on a database.
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Frequently asked questions
Do I still need a collar if my dog wears a harness?
Yes. Under the Control of Dogs Order 1992, a dog in a public place in Great Britain must wear a collar showing the owner's name and address. You can clip the lead to the harness.
Will a harness stop my dog pulling?
Some designs, such as front-clip harnesses, can reduce pulling, but training matters most. A harness is a tool, not a replacement for loose-lead training.
How do I measure my dog for a harness?
Measure the widest part of the chest behind the front legs and the neck, and compare with the manufacturer's size chart. Sizes differ between brands, so do not assume.
Is a harness better for flat-faced breeds?
Many vets and trainers recommend harnesses for dogs with short noses or breathing sensitivities, because pressure on the neck is not ideal. Your vet can advise on your own dog.
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