My kittens are 12 weeks old, still trying to find them homes but I just noticed they all including mama cat have so many fleas! I just gave them all Hartz flea drops on the back of the neck. I work a lot so I didn't notice the huge flea problem, and I think one or more of them have worms..I'm freaking out right now, I have no clue what to do to get rid of them. Will the flea medicine kill them all or do I need to do something more drastic. Please help! I feel like a horrible mom :/