Recently I've noticed one of my diamond doves has a "humpback" and her wings don't fold behind her back anymore. She can still fly and she is eating daily. Is she obese? My other dove was obese earlier this year but it was due to eating too much millets. I stopped giving them millets for a few months and started giving it to them again recently and now my other dove is looking rather odd. I want to make sure it isn't any sort of other ailment other than she's a little chubby. I'll lay off the millets for now and see if anything improves. Attached is a photo, the dove in front is the one I am concerned about.