Katie is a strange one. The vet taught us how to check for mammary cancer because of the body change, but she's still in the clear. This is the same dog that broke out in hives so bad during her first and only heat, she was put on Methylpredisolone for the duration. The more she licked to keep herself clean, the more hives she got. She was either allergic to herself, or so stressed nerves got the better of her and brought out hive like bumps.
Never had a allergy/hives outbreak since. She's a strange one for sure.