Hey guys! I am a first time puppy owner and we have a 12 week old Cocker Tzu. Whem we got him, he had worms, scabies mites and fleas really bad. We have gone through 2 rounds of shots, about to get his 3rd, and he keeps having this rash on his belly. We feed him Purina puppy pouches that the breeder was feeding him, amd the vet doesnt seem.to be worried. He has licked, scratched and pulled off hair on his back left leg, and constantly itches. We are doing benedryl 2 times per day, and we have done oatmeal calming baths and an apple cider vinegar bath. Suggestions on how to get rid of this rash and help him grow back his hair? This is a pic of his poor belly.