Best harness for Toy Fox Terrier on a budget

Small dog harnesses have some real fitting challenges — most are too loose around the chest or too rigid for smaller, leaner builds, and the right harness for a Chihuahua is genuinely different from what works on a Dachshund. Sounds like your Toy Fox Terrier has outgrown their puppy harness, which is a great moment to get the fit right properly. To point you to the best option: how much does your dog weigh now, what are you mainly using the harness for — daily walks, travel, something else — and have you had any issues with slipping or rubbing with the old one?

That side-slipping is really common with generic puppy harnesses — they're often cut too wide in the chest panel for lean terrier builds. The rubbing under the leg usually means the armhole is too large, so the edge sits right on the skin instead of clear of it. At 4.5kg your Toy Fox Terrier is right in that tricky middle zone between XS and S sizing, so you need something with proper adjustment across both the neck and chest independently. Can I ask — does she pull much on the lead, or is she fairly easy to walk?

Perfect — that means you don't need anything heavy-duty with a front clip for pulling correction, which keeps your options open and the cost down. My recommendation is the Rabbitgoo No-Pull Dog Harness in XS. It's around £12–£14 on Amazon UK, and it has four adjustment points — neck, chest, and both sides of the girth strap — which is genuinely unusual at this price. That independent adjustment is exactly what solves the slipping problem on lean terrier builds. The armhole is also cut closer and softer-edged than most budget options, which should prevent the rubbing. It has both a back clip for easy daily walks and a front clip if you ever need more control. For a dog her size and temperament it's the best value option I'd trust.

Good question — sizing is where people go wrong most often with this harness. Measure the narrowest part of her neck and the widest part of her chest (just behind the front legs) with a soft tape measure. For a 4.5kg Toy Fox Terrier you're almost certainly in the XS range, which covers roughly a 33–42cm chest. If she's right at the top of that range, size up to S rather than forcing XS — it's better to have a little room you can tighten down than to fight a harness that's too snug. The four adjustment points mean XS has plenty of range if she's solidly in it.

Great — once you have those numbers the sizing decision is easy. The Rabbitgoo XS should serve her really well for daily walks, and at that price if anything changes as she settles into adulthood it's not a painful replacement. Hope she enjoys the upgrade from the old one!