Last night I applied Frontline to my 8mos old GSD and today the fleas seem to have gone crazy! She's scratching even more, shaking her head and running around as though she's trying to get away from them. I'm thinking that its just the Frontline doing its thing but I feel so sorry for her. She's miserable!! I a wondering how soon after appling Frontline can I give her a bath? And would it be too much if I used a flea shampoo or should I use just a regular dog shampoo?