sounds like yeast. his diet could be a factor. if he is eating a food high in starchy carbs like potatoes that could be contributing to it. and he could actually have a yeast infection. My pitbull did and we got shampoo from the vet and anti-fungal meds and it cleared it up. Talk to your vet about the possiblity of a yeast infection and check his food for starchy carbs and switch him to something else. Might have to go grain-inclusive and look for something with just whole brown rice as the carb source to avoid potato.
