I've been putting Advantage on my Dad's cat Miss Kitty for years but this year the ticks are so bad I decided to switch to Frontline Plus for cats (my vet recommended it over the phone). To save money I bought the Frontline Plus for Dogs online - not from my vet - but now I'm concerned if it is safe to do that like you can with Advantage. I bought the large dog size and I know how much to measure out for her. I just want to make sure it's safe to use the one for dogs on cats.

Anyone use it like that or know for a fact that it is safe?