Flea treatment for cats living with rabbits

A Burmese sharing a home with a rabbit — that's a combination that needs a bit of care when it comes to flea treatment. Cat flea products have a safety consideration that doesn't apply to dogs: permethrin and several other insecticides that are perfectly safe for dogs are toxic to cats, so using the wrong product can be fatal. With a rabbit in the mix, we also need to think about what your cat might transfer to a small animal they cuddle up with. Before I point you in the right direction, can you tell me roughly how heavy your Burmese is, whether this is an active infestation or you're looking to prevent one, and have you treated your home yet?

Good to know — at 4.5kg she's a healthy weight and well within the range for standard adult cat treatments. Given the rabbit, the ingredient I'd steer you toward is imidacloprid. It's what's in Advantage, and it's one of the few flea actives that has a solid safety record around small mammals like rabbits, both from direct contact and from environmental residue. Once it's dry on your cat — usually around 24 hours — the risk of transfer is minimal. Can I ask: do the rabbit and your cat share sleeping spots or spend a lot of time in close contact?

That's close enough contact to be mindful of. My recommendation is Advantage 80 spot-on for cats — the 80mg dose is the right strength for a cat over 4kg. Apply it to the back of the neck, keep them apart from the rabbit for 24 hours while it dries, and you're in a safe position. Imidacloprid works by killing adult fleas on contact, so it starts working within a day. One thing to be aware of: it doesn't kill flea eggs or larvae, which is why treating your home matters as much as treating your cat. The majority of a flea infestation lives in the environment, not on the animal.

For the home, Indorex Defence household spray is the most widely recommended option — it contains permethrin and pyriproxyfen, which tackles both adult fleas and breaks the breeding cycle. Here's the important part: permethrin is safe to use in a room, but the rabbit must be removed before you spray and should not go back in until everything is completely dry and the room has been ventilated, typically a couple of hours minimum. The spray itself is fine once dry — it's the wet product that poses a risk. Spray carpets, skirting boards, soft furnishings, and anywhere your cat rests. You won't need to treat the rabbit directly; keeping them out during application and letting the room air is sufficient.

Exactly right. One application of Advantage 80 now, and then once a month to stay on top of it — fleas are persistent and the home environment can reinfect a treated cat if you don't keep up. Once you've done the home spray as well, most infestations are under control within four to six weeks. Given the rabbit in the home, I'd make monthly treatment a permanent habit rather than something seasonal. You're in a good position — you caught it early and you have the right information now.