How to Pick the Right Dog Harness for Your Dog
A good dog harness is one of those small purchases that quietly changes every walk — less strain on your dog's neck, more control in your hands, and a lot less lunging at the end of the lead. But not every harness is built the same, and here's the part most product pages skip: the wrong style can actually make a determined puller worse, not better.
This guide walks you through how to choose a dog harness that genuinely fits your dog and your walks — why vets favour them over collars, the main styles and who each one suits, how to size one so it can't rub or slip, and how a no-pull design fits into the bigger picture (spoiler: it's a helper, not a magic fix).
Key takeaways
- A harness spreads leash force across the chest instead of loading the neck — gentler on the windpipe, airway, and even eye pressure, especially for small and flat-faced dogs.
- Clip position matters more than the "harness" label: a back-clip suits calm walkers, while a front-clip is the one that helps redirect a dog that pulls.
- Fit beats brand every time — a harness you can slip two fingers under, that your dog can't back out of, is safer than any premium label fitted loosely.
- A no-pull harness manages pulling; it doesn't teach loose-leash walking on its own. The training still does the real work.
- Keep a flat collar for ID tags — just move the leash to the harness.
Why walk your dog on a harness instead of a collar?
A collar is perfect for holding ID tags, and for a relaxed dog that never pulls, it's fine on the lead too. The trouble starts when a dog leans into the leash. All of that force lands on a narrow band around the neck — right over the windpipe and the big blood vessels that run to the head. A dog harness takes the same force and spreads it across the much larger surface of the chest and shoulders.
That difference isn't just comfort. In a well-known veterinary study, dogs' internal eye pressure rose significantly when they pulled against a neck collar, but stayed steady when the same force went through a harness — because a tight collar squeezes the neck's veins and backs pressure up toward the head. A 2025 follow-up found the collar effect was strongest in flat-faced breeds, whose eye pressure climbed with a collar even standing still — with their breathing rate rising too.
Who benefits most: small and toy breeds prone to a collapsing windpipe (Yorkies, Pomeranians, Chihuahuas), flat-faced dogs that already work harder to breathe (French Bulldogs, Pugs, Bostons), and long-backed breeds like Dachshunds. For these dogs, vets routinely suggest keeping the leash off the neck entirely.
One honest caveat before we go further: a harness protects the neck, but it does not automatically stop pulling — and a plain back-clip harness can even let a strong dog dig in harder than a collar would. That's why the type of harness matters so much. Let's break the styles down.
The main types of dog harness (and who each one suits)
Walk into any pet shop and the wall of harnesses can feel overwhelming. In practice they come down to a handful of designs:
- Back-clip — the leash ring sits between the shoulder blades. Easy on and off, comfortable, and great for puppies and calm dogs that already walk politely. Its weakness: it gives a puller something to lean into.
- Front-clip (chest-clip) — the ring sits on the sternum. When the dog surges ahead, the leash gently turns them back toward you instead of letting them power forward. This is the go-to for dogs that pull.
- Dual-clip — has both rings, so you can start on the front for control and switch to the back once your dog's manners improve.
- Step-in — your dog steps in with their front paws and it buckles over the back. Ideal for dogs that dislike anything going over their head.
- Vest / padded — a broader, cushioned back-clip style that's kind on the coat and comfy for everyday strolls and smaller dogs.
- Head halter — technically its own category. It loops over the muzzle and steers the head, giving strong control of powerful dogs. Worth knowing: it is not a muzzle (your dog can still pant, drink, and take treats), and it needs slow, treat-based introduction and a gentle hand on the lead.
If you take one thing from this section, let it be this: match the harness to the dog in front of you. A gentle senior and a bouncy adolescent who tows you down the street need different tools.
Two harnesses we stock
Both of ours are comfortable, chest-distributing everyday harnesses — a great fit for the neck-and-airway reasons above. They're back-clip/step-in styles, so if your dog is a committed puller, pair them with the loose-leash training further down (or look for a dedicated front-clip design).
$29.99
- Built for the broad-chested, flat-faced build — pressure off the airway
- Reflective detailing for low-light and after-dark walks
- Three sizes (S–L), two designs, adjustable straps and a secure buckle
Keep in mind: it's a back-clip style, so pair it with loose-leash training for a dog that pulls hard.
View productFrom $39.99
- Built-in harness spreads leash force across the whole torso
- Waterproof, padded jacket for cold, wet-weather walks
- Small to 5X-Large in eleven colours
Keep in mind: it's a warm jacket-harness — best for cooler days rather than mid-summer heat.
View productWant more visibility options for evening walks? Our reflective dog harness guide goes deeper, and if you're torn between gear types, harness vs collar lays out the trade-offs side by side.
No-pull dog harnesses: what actually works
"No-pull" is the most searched-for harness feature and the most misunderstood. A true no-pull dog harness is really just a front-clip design: because the leash attaches at the chest, a forward lunge swings your dog's body back around toward you, so pulling becomes a much less effective way to get anywhere. Measured tests back this up — a front-connection harness cut pulling force about as much as a prong collar, without the aversive pinch.
The flip side is just as important. A standard back-clip harness offers no such steering, and in one study dogs actually pulled harder and longer on a back-clip harness than on a neck collar, simply because it was comfortable enough to really throw their weight into. So "I bought a harness and my dog still drags me" usually means the clip is in the wrong place, not that harnesses don't work.
Two honest notes to keep expectations realistic. First, a front-clip harness reduces pulling; it doesn't erase it — the teaching still happens through training. Second, the same chest strap that steers a puller can slightly limit shoulder movement, and researchers are still studying what that means long-term; it's an area of active, unsettled study rather than a proven harm, and a good fit is your best safeguard.
How to stop the pulling (the training half)
Gear buys you control; training changes the habit. The good news is the method is simple, kind, and backed by the veterinary behaviour community, which recommends reward-based training as the go-to approach and advises against prong, choke, and shock collars.
- Be a tree. The moment the leash goes tight, stop and plant your feet. Only walk on when the leash softens. Forward motion is the reward your dog is pulling for — so pulling can never earn it.
- Pay the position you want. Every few steps that your dog walks beside you on a loose, J-shaped leash, mark it and hand over a treat at your side. You're teaching them that staying close is what pays.
- Turn and go. If your dog locks onto something ahead, say their name and calmly walk the other way. Pulling gets them nowhere; checking in with you does.
- Start easy. Practise indoors or in the garden first, in short, upbeat sessions, and only add real-world distractions once the loose leash is reliable.
Give it time. Loose-leash walking is a genuinely hard skill, and progress is measured by a slack leash — even if that's only as far as the next lamppost — not by how far you get. Dogs trained with rewards rather than corrections also show less stress and a better bond with their owner, so patience pays off twice.
How to fit a dog harness correctly
The best harness in the world will chafe, slip, or restrict movement if it's the wrong size — so measure before you buy. With your dog standing, use a soft tape to take two numbers: the chest (barrel) girth around the widest point just behind the front legs, and the base of the neck where it meets the shoulders. Chest girth is the number that matters most; if your dog lands between sizes, size up and tighten the straps.
Once it's on, run these quick checks:
- The two-finger test. You should be able to slide two fingers flat under any strap — the neck strap, the chest strap, and the girth strap behind the front legs. More than that and it's too loose; less and it's too tight.
- The escape test. Gently try to pull the harness forward over your dog's head. If it slips off or your dog can back out of it, the girth strap is too loose — tighten until it can't.
- Check for rubbing. The girth strap should sit roughly two finger-widths behind the front legs, not sawing into the armpit crease. Peek at those hidden spots a couple of times a week for redness or missing hair, and re-check the whole fit as puppies grow.
One myth worth retiring: the idea that a Y-shaped chest strap is scientifically proven to "free" the shoulders while a straight strap restricts them. The small studies that exist found both shapes change shoulder movement a little, so fit on your individual dog matters far more than the strap shape on the label. For a broader rundown of styles and sizing, the American Kennel Club's harness guide is a solid, vet-informed reference.
Choose the style that matches your dog, fit it properly, and back it with a little kind training, and a harness turns the daily walk into the calm, comfortable outing it's meant to be. Browse our full harness collection to find the right fit for yours.
Keep reading
- The best dog harness for small dogs — sizing and picks for toy and small breeds.
- Leash training for dogs — teach a calm, loose-leash walk step by step.
- Choosing the right dog collar — the collar's still the place for ID tags.
- Choosing the right leash — the best lead to pair with your harness.
Frequently Asked Questions
Is a harness really better than a collar?
For walking a dog that pulls — or any small, flat-faced, or long-backed dog — yes. A harness keeps leash force off the neck, windpipe, and the veins that affect eye pressure, spreading it across the chest instead. Collars are still great for carrying ID tags; the key move is simply attaching the leash to the harness.
Do no-pull harnesses actually work?
A front-clip no-pull harness genuinely reduces pulling by turning your dog back toward you when they surge ahead, and studies show it lowers pulling force meaningfully. But it manages the behaviour rather than curing it — you'll get the lasting change by combining it with reward-based loose-leash training.
Front-clip or back-clip — which should I choose?
Choose a front-clip if your dog pulls, since it gives you steering control. A back-clip is comfortable and simple for puppies and dogs that already walk nicely. A dual-clip harness lets you use the front now and switch to the back as your dog improves.
How tight should a dog harness be?
Snug enough that you can slide two fingers flat under each strap, but no tighter. Then test it: if you can pull it forward over your dog's head or they can wriggle out, it's too loose and needs adjusting before you head out.
Are harnesses good for small or flat-faced dogs?
They're especially good for them. Toy breeds prone to a collapsing windpipe and flat-faced breeds that already breathe harder both do better with the leash off the neck, which is exactly what a well-fitted harness achieves.
We're a team of dog lovers who spend our days around collars, leashes and harnesses, so we know how much the right fit changes a walk. For this guide we cross-checked our advice against the American Kennel Club, the veterinary-behaviour body AVSAB and peer-reviewed studies on harness fit and leash force, so what you follow is grounded in real evidence rather than guesswork.
