My cat, Brandy, is almost 3 years old. Last summer she developed small bumps on her face, head, neck, and other areas of her body. It went from just one to several and she pulled out a lot of her hair. I took her to the vet and they said she was likely allergic to ragweed/pollen. After they gave her a steroid shot she became better, but weeks later the same thing. This last trip to the vet was even more frustrating. Because she had received so many of the steroid shots (3-4) I decided against giving her anymore because of the risk of diabetes. We changed her food to a limited ingredient diet brand and she has been on a daily oral antihistamine. She has fewer bumps, but a noticeably larger hair loss problem and it is a concern that she may be slightly constipated. What could be wrong with her?