my CAG began picking for seemingly no reason at all. We went through all of the tests with an Avian Vet, but all of the bloodwork came back just fine. With feather plucking a thorough checkup is necessary to rule out illness. Afterward, I would suggest trying Bird-elicious (an all organic food). After only 3 weeks on the food, my CAG had fully transitioned and loved the food. For the first week, I didn't think she would ever eat it. Within 4 weeks, she had pin feathers all over her body, and now is fully feathered again.
You can find this food at birdelicious.com
I'm a true believer!!!