Yesterday I found a flea on Bean so I got our flea comb and alas, I found more. He doesn't really have any flea dirt, but I've found multiple fleas, and I want to get rid of this as soon as possible. I have another rabbit as well who I got several weeks ago, and I think she may have fleas as well. (She doesn't like being touched or groomed much.) Can I only get Revolution and Advantage through a vet prescription? Do you guys have any other suggestions? Thanks!