Sting or ant bites could very well trigger her to "attack" herself. Benadryl might be a good solution. However, I would hesitate to give it to her orally. They do make a Benadryl cream/lotion in a tube that you might try just a very thin layer of after you rinse of the antibiotic. Benadryl is given to animals based on their weight orally. We use it with several of our dogs at one pill per 30 pounds of body weight. So dosing a bird becomes more complicated.