Best harness for Border Terrier puppy

Starting harness training at 10 weeks is exactly the right instinct — getting a puppy comfortable with wearing one early makes everything easier later. Not all no-pull harnesses are equal though: front-clip harnesses work well for most dogs, but fit is everything, especially on a wriggling puppy who's going to grow fast. Before I point you in a direction, can you tell me roughly how big your Border Terrier pup is now, whether they've worn anything like a harness yet, and what your main goal is — just getting them used to wearing it, or starting to walk on a loose lead too?

Good — that's the right approach. At 1.5kg she's tiny, so your biggest challenge isn't pulling at all yet, it's finding something that actually fits without rubbing or restricting her front legs. Border Terriers have a deep chest and narrow waist, which means a lot of adjustable harnesses gap badly at the back or slip over the head. What I'd focus on for the next six weeks is a step-in or H-style harness with a back clip — front clip isn't necessary at this stage and can interfere with natural puppy movement while she's still developing her gait. Has she had any reaction to things being put over her head, or are you happy to try either style?

Understood — and that's a real concern with puppies, you don't want to buy three harnesses in as many months. My recommendation is the Ruffwear Front Range Harness in size XXS. It fits a chest girth of roughly 33–43cm, which should suit her now and carry her well into adolescence. It's an H-style with a padded chest panel, two adjustment points, and a back clip for everyday walking. The fit is precise and it doesn't twist or shift the way cheaper harnesses do on small, active dogs. It's also durable enough that it won't need replacing as she grows into the XS range — Ruffwear sizes overlap well. For the first two weeks just put it on her indoors for short stretches while she eats or plays, so wearing it becomes completely normal before you ever attach a lead.

The Front Range is a step-in style, so you clip it underneath rather than pulling it over the head — most puppies tolerate it well once they're used to the routine. Yes, you should still have a collar with an ID tag on it; legally in the UK dogs must wear one in public with your contact details, and it's useful for identification even when the harness is on. Keep the collar loose enough to fit two fingers underneath and check it weekly — puppies can outgrow a collar in days at this age. Use the harness for walks and the collar just for the tag. That combination works well for the whole introduction period.

Great choice — you're starting her off properly. The key thing over the next six weeks is just repetition and keeping it positive: short sessions, no pressure, let her set the pace. By the time she's ready for proper walks she'll barely notice it's on. Good luck with her.