I would be very concered with using any of the over the counter stuff on any animal.
Now having said that:
I called my vet while summering hundreds of miles from home to say,
“Bugsy & both cats have fleas what should I do? There’s no way I can get back to town & no rabbit vet here.”
She told me not to use any of the store bought neck/butt liquid treatments & to absolutely not put a flea collar on a rabbit or on the cat that the rabbit is bonded to. The bunny might chew the collar.
She did say that a cat flea shampoo would be OK to use on the bunny, not a dog flea shampoo, only the cat one.
Last year I got fleas here & after being successfull up north on holidays – I tried to save money & do the store bought treatment.
It was 3 months of fighting trying to get rid of the fleas. I spent just as much if not more than I would have at the vet for flea treatment.
I bathed the 2 cats & dog. Dog & cats also got flea collars.
I took the budgies to mom’s & went through the house room by room.
Cleaned very well & then sprayed everything well with Hearts house spray. No body, even me, got into the sprayed rooms for 2 or 3 days.
The 2 rabbits were only bathed & their NIC cage was only vinegar soaked, carpet tossed, & net flooring purchased.
A couple of weeks later, the fleas were back so, the whole proccess was repeated.
A couple of weeks later, the fleas were back so, the whole proccess was repeated, yet again.
I should point out that I clean with vinegar & the floors get done with bleach water – I’m very chemical nervous because of the budgies. There are no other cleaning chemicals, insecticides or dangerous stuff in my house. The cats were indoor cats. The only poison that has ever been in here was that spray & those collars.
So a month after the fleas are gone, the kitten starts refusing to eat. A short while later the 7 year old cat starts refusing to eat.
A fortune was spent on different foods trying to get then to eat.
Well over $2000 dollars in vet fees later I had to put both cats to sleep because their livers shut down.
Why they had liver problems was never discovered.
After hearing about a web site that is collecting horror stories about that companies flea treatments & different horrific effects they have on some animals, I think the cats were poisoned – by me – using this “safe” over the counter stuff – following proper directions too.
I can’t prove it but that’s what I think.
Please be very very very carefull deciding the best course of action.