Flea treatment for farm dogs

A working Border Collie on a sheep farm with regular wildlife contact is about as high a flea-risk situation as it gets — you're dealing with constant reinfestation pressure from the environment, not just the odd stray flea. Worth knowing upfront: 95% of fleas actually live in the environment rather than on the dog itself, so a single on-dog product rarely keeps things under control on its own, and in a farm setting that challenge is multiplied. To point you in the right direction: how big is your Collie, roughly — standard working size or on the leaner side? And have you noticed any signs of fleas on the dog yet, or are you looking to get solid prevention in place before it becomes a problem?

That recurring pattern — finding fleas after field work — is classic reinfestation from wildlife and the environment rather than a problem that's taken hold on him. The good news is you've caught it before it's established indoors. Given the constant exposure he has, you need something that kills fast and stays active for a decent stretch, because a monthly spot-on will leave gaps when he's picking fleas up almost daily. What's your preferred route — spot-on, tablet, or are you open to either?

In that case I'd go with Bravecto Chewable Tablet for dogs — the 500mg dose covers 20–40kg, which fits him well. It's a single chew that gives 12 weeks of flea and tick protection, which for a working farm dog is genuinely useful because you're treating four times a year rather than twelve. It works by releasing fluralaner into the bloodstream, so any flea that bites dies within hours — it doesn't rely on surface contact the way spot-ons do, which matters when he's out in long grass regularly. It's prescription-only in the UK so you'll need a quick vet sign-off, but most vets are straightforward about it for a healthy young dog. You can pick it up via your vet or through licensed online pharmacies. The other half of the job is treating your farm buildings and the indoor spaces he uses — a product like Indorex Defence Household Flea Spray will break the flea lifecycle in those areas and is worth doing once now and again in a few weeks.

Yes, and that's one of the main reasons it makes sense for a farm dog specifically. Bravecto covers the most common UK tick species including Ixodes ricinus, which is the one that carries Lyme disease. It kills ticks within 12 hours of attachment — not instant, but fast enough to significantly reduce transmission risk. On a working farm where tick exposure is regular, having that cover built into the same product is a real practical advantage over combining separate flea and tick treatments.

Good plan — your vet will likely know Bravecto well and it should be a quick conversation. Just don't forget the environmental side: spray the indoor areas and any farm outbuildings he sleeps in, because even with perfect on-dog protection, hatching fleas in the environment will keep landing on him. Sort both at the same time and you should get on top of it quickly.