I just noticed my cat has tiny hard bumps all over her belly, and they are not on the top of her skin, they are under her skin. She had gotten fixed, and is eating a different brand of hard food, she's about 5-6 years old. What could be wrong with her? I'm honestly afraid, is this a sign of cancer or could it be some sort of allergic reaction to the new food she's on? I just moved to Kansas, and had not noticed such bumps untill today at 7:21am.