Hi I've just got 2 kittens, never owned cats before, and was wondering is it better to get the worm/flea treatment at the vet's or would it be ok to get it from Pets At Home for example, as I expect it would be a lot cheaper. Is there much difference between the treatment at the vet's and that at a pet shop? I was surprised that the vet didn't do it themselves but just gave me the stuff to treat them myself at home!