hello, a while back my dog got some bald spots and people on here gave me advise and it worked. Well about a week ago I ran out of salmon oil and just havent bought it, but last night i noticed my dog had some bumps on her back and head. Today the bumps on her head have no hair and are red and look like if she had been scratching, but she cant sratch her head. What could be the problem, I feed her natural balance with salmon oil so its not the food. thanx in advance.