Perry and Daisy get a bath about every two weeks. They mostly stay in the house and are out on a cement patio so we don't worry about baths too much. We also use an oatmeal shampoo.
A word of warning, if you use Flea Shampoo please be very careful that you don't get it in your dogs eyes, Perry got it in one of his eyes and it burned it. We took him to our Vet and we had medication to put on him.
It was awful, he suffered quite a bit, so we stopped using it and just do the Advantage.