You can get a fine-toothed flea comb and comb through your cat's fur, especially on the back, shoulders and base of the tail. That will catch the nasty little critters and if you are quick you can crush them between the backs of your fingernails. But to get rid of them you need to treat for them.
I have used the original formula Advantage on all my cats without any problems. However, this time I treated my two girl spays with Advantage II, and they both got nerve damage!
Fortunately, I noticed it with Koi, my long-haired calico because she slept with me, and I noticed her head tilt and eye jitter. I called the vet early the next morning, and he had me bathe her in Dawn liquid dishwashing detergent and bring her in to flush her system. That, and a lot of prayer, saved her. She is now back to normal, except now her coat is scruffy, like the horrible experience aged her.
Somemore, my little long-haired Manx, was not so lucky. Unfortunately, in the chaos of a 4 cat household, having to go out of town on business, and being extra busy, I didn't notice her vestibulary symptoms for two weeks, too late to bathe her. She's developed heart problems, she's constipated, her head/neck hurts, she goes around in circles, she won't drink water (I have to hand feed her a mixture of water & canned catfood), she slinks and hides, and she feels miserable! I've spent a small fortune on vets, with more to come, as I have to make an appointment with a vet. neurologist, who is 2 counties away. If her quality of life can't be improved I will have to have her put down! That makes me very sad, because she is a sweet little kitty, very pretty and feminine looking, with the most perfect little ears I've ever soon on a cat.
A vet tech friend told me she's seen a lot of these reactions to Advantage II. Have you, or do you know of anybody else whose cats have had bad reactions to Advantage II?
My too neutered boys go outside, so instead of Advantage II, I used Revolution on them. No problems. On a cat I used to have I used another product, Foremost, and he was allergic to it.