Harness or collar: the debate that divides the dog park

In any park you'll find passionate champions of both the harness and the collar. The truth is less exciting: both have their place, and what matters is that whichever you choose is comfortable, safe and properly fitted to your dog.

The collar: simple and always on

A collar is handy for carrying an ID tag and for dogs who walk calmly by your side. It's light, goes on in a second and doesn't get in the way at home.

The drawback comes with dogs who pull a lot: all the pressure is concentrated on the neck. For dogs who tend to pull, small dogs or short-nosed breeds, many professionals prefer a harness for walks.

The harness: pressure spread more evenly

A harness spreads the force across the chest and shoulders, and gives you more control when walking energetic dogs or in busy places. It's also very useful for puppies who are learning to walk on a lead.

That said, they aren't all the same. Look for one that leaves the shoulders free so your dog can move his front legs properly, and that doesn't rub under the armpits.

• Collar: for dogs who walk without pulling and for keeping ID on at all times.
• Harness: for dogs who pull, puppies, small dogs or short-nosed breeds.
• Both: plenty of dogs wear a collar with a tag at home and a harness to go out.

The two-finger test

It doesn't matter what you choose if the size is wrong. Measure your dog before you buy: round the neck for a collar, and round the chest, just behind the front legs, for a harness.

• You should be able to fit two fingers between the collar or harness strap and his body.
• If he can slip it over his head by backing up, it's too loose.
• If it leaves marks, rubs or makes it hard for him to move, it's too tight.
• Check puppies' sizes often: they grow faster than you think.

And pulling won't fix itself

Not even the best harness teaches a dog to walk nicely. If your dog drags you along, use treats to practise loose-lead walking and, if you're struggling, ask a dog trainer for help. If you notice something hurts when you put it on him or when he walks, see your vet.

At Petuki you'll find collars, harnesses and leads in a range of sizes so you can find the one that fits your dog best.