Harness or collar for your dog: which to choose, and when?
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
It’s one of the first questions every new owner asks: should you walk your dog on a collar or a harness? The answer depends on size, leash manners and intended use. Planète Pets breaks it down to help you kit out your companion, alongside our dog accessories section.
Contents · 5 sections
The collar: simplicity and identification
Light and quick to put on, the collar remains the baseline accessory: it carries the ID tag and goes unnoticed day to day. For a calm dog that doesn’t pull, a well-fitted flat collar (you should be able to slide two fingers underneath) is perfectly fine on walks.
Its limitation is physiological: every pull acts directly on the neck. For a dog that pulls hard, a puppy still learning, or a breed with a fragile trachea, repeated jerks can become a real problem. Choke chains and prong collars should be avoided altogether: they rely on discomfort, not training.
The harness: distributing force and adding control
A harness spreads pressure across the chest and ribcage, areas far sturdier than the neck. It’s the recommended option for:
- dogs that pull on the leash, while you work on loose-leash walking;
- puppies and delicate small breeds (Chihuahua, Yorkshire Terrier, French Bulldog);
- sporting activities: canicross, hiking, long-line work;
- nervous dogs, with an escape-proof model.
Watch the cut, but do not trust the labels: when Lafuente and colleagues measured shoulder extension on a treadmill in 2019, the "non-restrictive" Y model hindered movement more than the horizontal strap, as our article on shoulder extension under a harness explains. So-called no-pull models, with a front clip, help redirect a dog that pulls, but never replace training.
Getting the size and materials right
Measure the girth just behind the front legs, then check the manufacturer’s size chart: every brand sizes differently. Nylon is light and washable, biothane shrugs off water and mud, leather ages beautifully but needs care. Check the stitching, the strength of the buckles and the presence of reflective elements for night-time outings.
How much should you budget?
Expect €8 to €25 for a quality collar and €20 to €60 for a good harness, with sport or made-to-measure models climbing to €70 or €80. Well-chosen gear lasts for years: better to invest once than to buy three ill-fitting models.
Our Planète Pets recommendation
In practice the two are complementary: the collar for identification and everyday moments, the harness for walks and activities. In the car, neither is enough on its own: a dedicated safety harness or a proper crate is required, as explained in our guide to the car travel crate. Find all our comparisons on the dog hub.
An accessory from our shop for this use: Rear support harness for dogs, with handle (€25.90) · the whole shop
This guide is part of Planète Pets’s Dogs universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.