In spite of using Revolution on my 3-year old cat every month, he seems to now be getting ticks again. Do products lose their effectiveness after awhile? Also since he was a kitten, he's shaken his head as if he's uncomfortable with fleas. Yet our vet never finds evidence. Is there anything else I can do or give him that might help?
If the area you live in is infested with ticks then no product will work 100%. try treating your yard as well. Any garden store will sell a product that kills ticks. Make sure to follow directions regarding your pets in the yard