Finally, we have brought home our two kittens. Took them to the vet first, and since we have reason to suspect they have fleas, he gave us a spray that says it contains 0.25% fipronil. According to the box, there are no side effects and we are to apply it all over the body, taking care to avoid the eyes. They are only about 8 weeks old and weigh about a pound. Should it be safe to use it in the manner indicated? I'd like to trust that the vet knows what he's doing; but I know how much kittens groom themselves and each other, and I'm wary of using a flea spray that's applied from head to toe.