Harness or collar for a small dog: which is safer and why do you choose what?

You see it regularly on the street: a small dog on a leash suddenly pulling sharply towards another dog, and the owner instinctively pulling back. Not a big moment, but for a dog with a delicate neck, that brief jerk can have more consequences than you think. It's precisely this situation where the choice between a harness and a collar suddenly becomes very concrete.

Why a collar isn't always the best choice for small dogs

A collar sits around the neck. For larger, more robust dogs, this isn't a problem in itself, but it's different for small breeds. Dogs like Maltipoos, Bichons, Pomeranians, and Shih Tzus naturally have a more delicate build. Their windpipe is smaller and more vulnerable, and some of these breeds are genetically more susceptible to tracheal collapse, a condition where the trachea narrows under pressure.

A collar concentrates all the force of a yank or a sudden pulling motion on one point: the throat. It doesn't even have to be hard to lead to irritation or damage over time. Veterinarians generally agree: for small dogs, a collar is fine as an identification tool for their tags, but for daily walks on a leash, there are better alternatives.

What a harness does differently

A harness distributes pressure across the chest and shoulders. If your dog pulls, steps away at an angle, or moves quickly, the force is spread over a larger surface area and doesn't go directly to the throat. That's a significant difference for small dogs.

Well-fitting harnesses also offer more control without having to use more force. You can gently guide your dog without having to pull on the leash. That works more pleasantly for both of you, especially if your dog is still learning how to walk on a leash.

There's also a practical benefit that owners of small dogs often mention: a harness prevents the dog from "backing out" of its gear, backing up, and stepping out. A collar allows more room to escape with enough panic or resistance. A properly adjusted harness is more secure.

When do you still choose a collar?

A collar isn't a bad choice in all situations. For dogs who are good at off-leash walking, rarely or never pull, and only walk short distances on a leash occasionally, a collar can work perfectly fine. And as mentioned: for the tag with your contact details, a collar is practical, even if you walk your dog daily in a harness.

Some dogs also have a clear preference. There are dogs who find a harness unpleasant, especially if they learn to use it as an adult dog. In that case, it pays to make the transition slowly, with positive associations, so that the harness doesn't become something they run away from.

What to look for when choosing a harness

Not every harness is the same. For small dogs, a few things are extra important. The fit is crucial: the harness shouldn't be too loose (then it chafes or the dog can get out), but also not too tight (then it restricts shoulder movement). Always check if you can fit two fingers between the harness and the skin.

Also pay attention to the material. Soft, padded fabrics are more comfortable for small dogs with delicate fur. And look at the leash attachment: a D-ring on the back gives you the most control for daily walks.

A harness that looks good is a nice bonus. But it always starts with how it fits.

Holy Moly will soon be launching a collection of harnesses for small dogs, designed with exactly these things in mind.