I have two bonded birds that are a strange couple — a 23 year old ringneck dove and his 3 year old budgie girlfriend. In almost all ways they get along incredibly well; they sleep together, share food, never bicker but there’s one issue. The budgie has taken to over preening the back of the dove’s head and he’s bald. She pulls out new feathers as soon as they come in. She hasn’t hurt him at all but it is a bit worrisome. I’d rather not separate them since they are so attached. I’ve tried distracting her with preening toys, food puzzles, using lots of small branches to chew but nothing has helped. Does anyone else have any suggestions?