Y-shaped harness, collar, head halter, choke chain or no-pull harness: the overview
Of all the equipment for walking your dog on leash, there is one item designed for the welfare of the dog: the Y-shaped harness, combined with a fixed leash of 10 feet (3 meters). A collar, a choke chain, a head halter (gentle leader) and a no-pull harness with a horizontal chest strap all work on the same principle: they make pulling unpleasant or painful, and precisely because of that they raise the stress that causes the pulling in the first place. Below are the six options side by side, what they do to your dog’s neck, shoulders and stress system, and what you should buy instead.
In short
A dog’s neck is just as vulnerable as ours: windpipe, thyroid gland, neck vertebrae. Anything that puts force on that area can cause injuries.
Dogs have no collarbone; the shoulder blade “floats”. A chest strap that runs horizontally across the shoulders pinches off the front leg movement like a pencil skirt.
Correction tools teach a dog that keeping tension on the leash hurts less than a jerk on a slack leash. So he deliberately keeps the leash tight.
A leash shorter than 10 feet (3 meters) immediately creates more tension; at 10 feet a dog is as relaxed as when off leash and actually pulls less.
Whether your dog is tense on the leash is visible in his body language before the leash goes tight. You learn those signals in the free webinar.
Six tools side by side
Tool | Where the force lands | Effect on stress and behavior | Verdict |
|---|---|---|---|
Y-shaped harness with the ring at the back | Across the strong ribcage; shoulder joint and neck stay free | No pain, natural movement, communicating through the leash is possible | The only harness we recommend |
Flat collar | On the neck: windpipe, thyroid gland, neck vertebrae | Every jerk or lunge loads the neck; demonstrably harmful when a dog lunges | Only for the ID tag, not for the leash |
Choke chain or slip lead | Tightens around the neck under tension | Pain and breathlessness; the dog learns to keep tension on to avoid the jerk | Never |
Head halter or gentle leader | On the bridge of the nose and the neck; pulls the head sideways | Frightening for many dogs and painful in the neck; suppresses the behavior without touching the cause | Never |
No-pull harness with a horizontal chest strap or a front ring | Across the shoulder joint, or via the front ring back onto the neck after all | Restricts the front leg movement; a front ring works like a collar | No |
Retractable leash | Constant tension, abrupt stop, heavy handle | Teaches pulling, gives jolts and noise, communicating through the leash is impossible | No; use a fixed 10 foot (3 meter) leash |
In summary: the only tool we recommend is a Y-shaped harness with the ring at the back, because the force lands on the ribcage and the shoulder and neck stay free; a flat collar is for the ID tag only, because every jerk lands on the windpipe, the thyroid gland and the neck vertebrae; a choke chain and a head halter are never used, because of the pain and the fear they cause; a no-pull harness with a horizontal chest strap or a front ring either restricts the front legs or works like a collar; and a retractable leash teaches pulling, so choose a fixed leash of 10 feet (3 meters).
Why the neck and the shoulders are the problem
When you pick up a puppy, you support his body and not his neck. For the same reason the leash does not belong on the neck: that is where the windpipe, the thyroid gland and the neck vertebrae are, and every jerk, every lunge and every stretch of constant pulling lands there. In our work with dogs who lunge on leash, the rule is simple: a dog who lunges on a collar damages his neck, so always use a well fitting Y-shaped harness.
The second problem sits lower down. Dogs have no collarbone; the shoulder blade hangs in muscle and moves with every step. A harness with a chest strap that runs horizontally across the shoulders (most “no-pull harnesses” and many standard harnesses) pinches that movement off like a pencil skirt. A harness with the leash ring at the front of the chest pulls the dog sideways under tension and, in a jerk, still works on the neck. You recognize the Y-shaped harness by its shape from the front: three straps meet at the sternum, and the ring sits at the back on the back panel.
Why correction tools keep the pulling going
A choke chain, a head halter or a prong collar “works” because pulling hurts. The result is not what the seller promises: a dog learns that keeping tension on the leash hurts less than a sudden jerk on a slack leash, and so he deliberately keeps the leash tight. On top of that, a new fear is added: fear of your reaction. A dog who is afraid of corrections wants to be as far away from his owner as possible, and that is pulling.
Pulling almost always has a cause: stress or arousal (hormonally the same thing), pain (a rhythmic trot takes less effort than controlled walking), fear, or earlier corrections. No piece of equipment solves that cause. What does work is explained in The 3 reasons why a dog pulls on the leash.
Choosing and fitting the Y-shaped harness
Part | What to look for |
|---|---|
Shape | A Y or egg shape from the front: three straps meet at the sternum (you can feel it as a bump) |
Ring | At the back on the back panel, not at the front on the chest |
Armpit | At least two fingers of room between the rear strap and the armpit (one finger for very small dogs) |
Tightness | Your hand should fit underneath; the ribcage moves when your dog breathes |
Buckles | Four buckles if your dog dislikes having anything pulled over his head |
Padding | A version with a pad for a bare belly or sensitive skin |
In summary: a good Y-shaped harness has a Y or egg shape at the front with three straps meeting at the sternum, the ring at the back on the back panel, at least two fingers of room between the rear strap and the armpit, enough room to slide your hand underneath, four buckles if your dog does not want anything over his head, and optionally a pad for a bare belly or sensitive skin.
If your dog is afraid of the harness, do not force it: get him used to it in small steps and keep the collar for the time being if you have to. How to introduce a harness without leaning over your dog (which is rude in dog language) is something we cover in our course.
The leash: ten feet, fixed, light
Research on dogs walked on 5 foot (1.5 meter) and 16 foot (5 meter) leashes and off leash shows that a dog on a short leash immediately shows more tension and sniffs less, while a dog on a long leash is just as relaxed as when off leash. Ten feet (3 meters) is the length a dog needs to move naturally, and against expectation he actually pulls less on a longer leash. Sixteen feet (5 meters) is fine for the more experienced; anything longer than 16 feet (5 meters) inside town takes too much handling skill.
Choose a light leash with as little metal as possible (metal dangles, makes noise and distracts) and a width that matches the weight: up to 18 lbs (8 kg) go for 0.4 inches (1 cm), up to 33 lbs (15 kg) 0.6 inches (1.5 cm), from 33 to 66 lbs (15 to 30 kg) 0.8 inches (2 cm), and above that 1 to 1.2 inches (2.5 to 3 cm). Do not buy a retractable leash: it is under constant tension, it stops abruptly with a jolt on the body, and the handle that shoots after a startled dog can traumatize him.
From our practice
The question our coaches hear most often at the start is this one: “Ten feet sounds far too long, will my dog not pull even more?” It is exactly the other way around. On a short leash the dog is constantly at the end of it and learns to pull. People who find the switch daunting bring the old leash along on the first few walks, or start with it and change over once it feels right. Almost nobody goes back. More than 30,000 dog parents have taken a Stressless Dogs course, and this is the first thing that changes for most of them.
Frequently asked questions
So is a collar never right?
For the ID tag with your phone number, yes; for the leash, no. As long as the leash is on the collar, every jerk and every lunge lands on the neck.
My dog pulls less with the head halter. Is that not a good thing?
He pulls less because pulling hurts his neck and his nose, not because he is relaxed. The cause of the pulling is still there, plus a new fear of the equipment. Look for the cause and switch to a Y-shaped harness.
Which harness exactly do you recommend?
A Y-shaped harness with the ring at the back on the back panel, fitted according to the table above. Several brands make this model; the shape and the fit matter more than the brand.
Can I use a shock absorber?
Yes, a shock absorber between the harness and the leash can take the jolts off the body of a strong puller. It is an addition alongside a good harness and the 10 foot (3 meter) leash, not a replacement.
Sources
Lafuente, M.P., Provis, L. and Schmalz, E.A. (2019). Effects of restrictive and non-restrictive harnesses on shoulder extension in dogs at walk and trot. Veterinary Record, 184, 64. Harnesses with a strap across the shoulder limit the extension of the front leg.
Carter, A., McNally, D. and Roshier, A. (2020). Canine collars: an investigation of collar type and the forces applied to a simulated neck model. Veterinary Record, 187. On the forces collars exert on the neck during a jerk.
Budzinski, C. and A. Dog Field Study, pulse study “At the heart of the walk”. Short leash versus long leash versus off leash: sniffing time and heart rate.
American Kennel Club. Dog Harness vs. Collar. A general comparison of harnesses and collars.
Read next
The 3 reasons why a dog pulls on the leash (and what you can do about it)
Stress free dog walks: 3 concrete tips
Why does my dog lunge at other dogs (and what actually helps)?
The best equipment is looking
A good harness prevents damage, but it does not solve the pulling. You do that by seeing when your dog gets tense, long before the leash goes tight: the lip licking, the ears going back, the change of pace. Once you read that, you keep the leash slack without ever having to jerk it. Those signals are what you learn in our free webinar on communicating with your dog.
Do you want to learn to walk on a slack leash, from introducing the harness to leash handling and curving around triggers? We do that step by step in the Stressless Communication Course.
Thank you for reading, on behalf of me and all the dogs.
Dog Behavior Consultant & Natural Dog Trainer