Flea & ticks, etc. medication is not cheap. I think a good one is Revolution. I know that you should avoid
Hartz but I don't really know anything else about this topic. And yes, they do tear up their fur. My friend's cat teared up his fur and went to the vet to find out that it was fleas from the old owner's residence. My friend uses Advantage(that's what the vet gave to her).