Harness vs. Collar: Which Should You Use?
For most dogs, a harness is the safer choice for walks. Collars place pressure on the throat and neck — and for dogs who pull, lunge, or have respiratory issues (like brachycephalic breeds such as pugs and bulldogs), this can cause real harm. A harness distributes pressure across the chest and shoulders, reducing strain and giving you better control.
That said, not all harnesses are built the same, and choosing the wrong one can cause discomfort, restrict movement, or actually make pulling worse. Here's what to know before you buy.
Types of Dog Harnesses Explained
Back-Clip Harnesses
The leash attaches to a ring on the dog's back. These are comfortable and easy to put on, making them great for calm dogs, small breeds, and puppies learning to walk on a leash. The downside: they give you less leverage over a dog who pulls, and can actually encourage pulling by allowing the dog to lean into the harness.
Best for: Small dogs, calm walkers, puppies
Front-Clip Harnesses
The leash clips to a ring on the dog's chest. When a dog lunges forward, the front clip redirects them back toward you — a built-in correction mechanism. These are highly effective for dogs learning loose-leash manners or strong pullers.
Best for: Pullers, dogs in training, medium to large breeds
Dual-Clip Harnesses
Have both a front and back clip, giving you flexibility depending on the situation. Many trainers recommend these as an all-purpose option. They're especially useful as your dog's leash skills develop.
Best for: Versatility, dogs in ongoing training
No-Pull / Head Halter Harnesses
A head halter fits around the dog's muzzle and head (similar to a horse halter). When the dog pulls, their head is turned back toward you. Highly effective for strong or reactive dogs, but requires an adjustment period and proper fit. These are not muzzles — dogs can eat, drink, and pant normally.
Best for: Very strong pullers, reactive dogs, large breeds
Key Features to Evaluate
- Fit and adjustability: Look for multiple adjustment points (chest, belly, and ideally the neck). A poorly fitting harness can chafe, slip off, or restrict movement. You should be able to fit two fingers under every strap.
- Padding: Chest and belly straps should be padded or have a soft lining, particularly for dogs with short coats or skin sensitivities.
- Material: Nylon is durable and easy to clean. Mesh is breathable for warmer climates. Avoid rough materials that may cause chafing on longer walks.
- Easy on/off: Step-in harnesses go over the front paws and are ideal for dogs who resist overhead harnesses. Over-the-head styles are often quicker but may stress neck-sensitive dogs.
- Reflective elements: Useful for early morning or evening walks. Not essential, but a meaningful safety upgrade.
- Handle on back: Some harnesses include a top handle — invaluable for lifting dogs into cars, navigating crowds, or gaining quick control.
Sizing: Get It Right
Never guess on sizing. Measure your dog's girth (the widest part of the chest, just behind the front legs) and neck circumference before purchasing. Most manufacturers provide size charts — use them. When in doubt between two sizes, choose the larger and tighten the straps.
| Dog Size | Typical Girth Range |
|---|---|
| Extra Small | 10–14 inches |
| Small | 14–20 inches |
| Medium | 20–27 inches |
| Large | 27–35 inches |
| Extra Large | 35+ inches |
Red Flags to Avoid
- Harnesses with a single point of adjustment (can't get a secure fit)
- Narrow straps with no padding on large dogs (pressure points and chafing)
- Harnesses where straps cross or dig into the shoulder joint (restricts natural movement)
- Clip hardware that feels flimsy or plastic — metal hardware is more reliable for dogs over 20 lbs
The right harness makes walks more enjoyable for both of you. Take the time to get the fit right, and check the straps for wear and tear regularly — especially if your dog is a strong puller.