Feather plucking — at my wit's end

My lovebird has been plucking for about two to three weeks. Vet ruled out medical causes. Tried new toys, diet changes, more interaction, less interaction, a different cage... nothing works. Has anyone actually successfully stopped plucking?

Okay but counterpoint — what about birds that are the complete opposite? My Indian Ringneck breaks every rule lol.

Exactly my thoughts. You said it better than I could have.