My cat has never had fleas(at least that i have seen) and I have always used frontline on my dog… should i start putting flea prevention stuff on my cat? and what works the best for the money?

i have tried multiple products and i know that to get rid of them for good ill have to have my house flea bombed but this isn’t an option, i just need to know what the best product is and that works the longest, because i am seeking to buy a year supply.

Well I got some flea drops from the vet ,it’s called first shield. They claimed it worked better than front line and advantage. Well after 2 wks the fleas are back. So what is the best flea drops and do I have to wait 2 more wks to use it or can I use it now.

The side effects of Advantage for cats that are most common include small amounts of hair loss, skin irritation and heavy salivation. Identify normal side effects of Advantage withadvice from a practicing veterinarian in this free video on pet care. Expert: James Talbott Bio: Dr. James R. Talbott is a staff veterinarian at Belle Forest Animal Hospital and Kennel in Nashville, Tenn. Filmmaker: Dimitri LaBarge

Now that spring has Spring has sprung where I live and the bugs will soon be prowling I am considering changing his flea and tick meds…. and I want to know what other folks think the most effective product is.

P.S. We have used Sentinel.
EDIT: Yeah to my knowledge Sentinel only prevents heartworm, roundworm, hookworm and fleas…..

Is there something else I should be worried about???