I have a 3 month old Yorkie-poo and I'm shopping for a good shampoo for him. Does anyone know about Bio-Groom products? The Tar-Sulfur shampoo provides relief due to itching, scratching, redness and scaling associated with flea bite dermatitis, seborrhea, psoriasis, "hot spots" and related skin disorders. It's baby-mild shampoo base is gentle to skin and hair that has been abused by scratching and matting. Would this be a good shampoo to use on him or should I go with fluffy puppy tearless shampoo?