My 8yr old buddy hammerhead has started to get bumps under his skin and it is all over his body. And today the started to break through like little valcanos and fester a few at a time. Now some are just open stores. He is now is pain and does not scratch at them ,they just raise up and pop open. Does anyone know what this could be ,or have treated this on there puppy.please help.. he is also my medical service dog.