This is 100% the fault of vets and the manufacturers. They both push to give treatments every month, and it’s simply not needed. We have 4 cats which only get treated when one or more actually gets fleas. One treatment of all 4 is enough to get rid of all the fleas. So how often do any of the cats get fleas? None of them got fleas last year, and so far no fleas this year either. It’s ridiculous to say they need monthly treatments, and it is purely for profit,