Flea & Tick Prevention After DE Failed

Diatomaceous earth failing isn't surprising — it's genuinely poor at controlling an active infestation on a dog, and it does almost nothing against ticks. If you've got fleas indoors already, DE won't break the lifecycle. Before I point you at something that will actually work, a couple of quick questions: how big is your Entlebucher, roughly — are we talking the typical 25–30 kg range? And are you dealing with an active flea problem right now, ticks too, or are you trying to get ahead of both going forward?

Got it — active infestation plus tick risk from woodland walks. That's a clear picture. For a 28 kg dog in that situation, I'd go straight to NexGard Spectra. It's a monthly chewable that kills fleas fast enough to break the indoor cycle, covers ticks including the nastier species you'll encounter in woodland, and also handles mites and lungworm. At her weight you'd use the large dog dose (30–60 kg box). One thing to be clear about: you'll also need to treat your home — vacuum hard, then use a household flea spray like Indorex on carpets and soft furnishings. The dog tablet won't fix eggs already in your carpet on its own.

Yes, it is prescription-only in the UK — but you don't need a physical vet visit. Online vet services like PetDrugs Online or VetUK let you fill out a short health questionnaire, a vet reviews it, and they post the medication out. It's usually straightforward for a healthy adult dog with no complicating conditions. If your Entlebucher is otherwise well and up to date on checks, most applications go through same day. First month will cost around £20–25 for the large dog dose, which is fair given the coverage you're getting.

One thorough treatment of the whole house — focusing on carpets, skirting boards, under furniture, and anywhere she sleeps — will typically last around 12 months if you do it properly. Vacuum first to stimulate the eggs to hatch, then spray. You'll probably still see the odd flea for a week or two after as remaining pupae hatch out, but NexGard killing them on your dog stops the cycle from restarting. You shouldn't need to retreat the house more than once a year unless you get a reinfestation from outside.

Good plan. To recap: NexGard Spectra large dog (30–60 kg) monthly for your Entlebucher, and one full Indorex treatment of the house this week. Within a month the indoor problem should be under control, and she'll have solid tick cover for your woodland walks ongoing. If you hit any issues with the online prescription process, VetUK tends to be the quickest. Good luck — it'll sort itself out faster than you'd think once you break the lifecycle.