If my dog is on prevention, does my cat need to be too?

If my dog is on prevention, does my cat need to be too? - Advanced Animal Care

I do believe so, yes.

If my dog is on prevention, does my cat need to be too? - Haywood Animal Hospital

Absolutely. All pets, whether indoor, outdoor, or both, should be on flea and tick prevention. Even if your dog is on prevention, it can still bring fleas and ticks into the house, which can then infest your cat.