Also switch your dog to a solid pet food like
http://www.primalpetfoods.com/ or
http://www.naturesvariety.com/
its what they were meant to eat.. dogs arent meant to eat baked cookies(dry food).. they were meant to eat raw meat/bones/organs
when i first got my dog apart from itching and worms, he had bad odor, fucked up skin, in 2 weeks of switching and feeding him good food he was perfect.. smells like roses now..
also thank me later