Do Dogs Actually Need a Harness or Is a Collar Enough
If you have ever stood in a pet shop or scrolled through an online store trying to decide between a harness and a collar, you are not the only one. It feels like it should be a simple decision but the more you look into it the more opinions you find, and most of them contradict each other. The honest answer is that both have their place and the right choice depends on your specific dog, how you walk them, and what you are trying to manage on those walks.
A collar is the default for most dog owners and for a lot of dogs it works perfectly well. If your dog walks calmly beside you, does not pull, and you are mainly using it to hold their ID tags and keep them identified, a well fitted collar does everything it needs to do. The issue comes when pulling is involved, which is where the collar versus harness conversation gets more serious.
When a dog pulls against a collar, the pressure goes directly to their neck and throat. For most healthy adult dogs an occasional pull is not going to cause lasting damage, but for dogs that pull constantly, pull hard, or pull and then lunge suddenly, that repeated pressure on the neck is not a small thing. Certain breeds feel this more than others. Dogs with short noses like pugs and French bulldogs already have compressed airways and anything that adds pressure to their throat makes breathing harder than it already is. Small breeds with delicate tracheas are also in a category where collar pressure over time can cause real problems. For these dogs a harness is not optional, it is genuinely the better choice and most vets will say the same thing.
For dogs that are still learning to walk on a lead, a harness also gives you more control without the risk that comes with correcting a pulling dog via a collar. When the pressure is distributed across the chest and shoulders instead of the neck, you can guide and redirect the dog without causing discomfort, and the dog can focus on learning the behaviour rather than reacting to an uncomfortable sensation around their throat.
The argument against harnesses is usually that they encourage pulling because the dog feels less resistance and leans into it more freely. There is some truth to this depending on the type of harness. A back clip harness, where the lead attaches at the top of the dog's back, does give a strong puller more leverage to pull with. A front clip harness, where the lead attaches at the chest, redirects the dog towards you when they pull forward and is a much more effective tool for managing the behaviour. So if pulling is your main concern, the type of harness matters as much as whether you use one at all. There is also a practical case for using both at the same time, which more dog owners do than you might expect. The collar holds the ID tags and stays on the dog throughout the day. The harness goes on for walks and comes off when you are back inside. This way you are not choosing between them so much as using each one for what it is actually good at.
What matters most in either case is fit. A collar that is too loose can slip over a dog's head, especially on breeds with narrow skulls relative to their necks. A harness that is too tight will restrict movement and cause rubbing under the legs. Two fingers should fit comfortably under any strap without the whole thing feeling loose, and you should check the fit regularly because dogs' bodies change, especially younger dogs that are still growing.
If your dog pulls, has a short nose, is a small or toy breed, or is still in the early stages of lead training, a harness is the more sensible choice and worth the small adjustment to your routine. If your dog is already calm on the lead and walks well beside you, a properly fitted collar is absolutely enough and there is no reason to change what is working.
Our Adjustable Dog Vest Harness and Vest Walking Leash are both designed with fit and comfort in mind, and the adjustable straps mean they work across a range of sizes without needing to buy a different one as your dog grows. If you are making the switch from collar to harness or buying for a new dog, they are a practical starting point that covers what most dogs actually need on a daily walk.