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 lovebird breaks every rule lol.

Did this start suddenly or was it gradual? When my lovebird did this it turned out to be molting — they get uncomfortable and cranky.

My Mango went through a phase like this around 10 years. I was terrified but it passed. Birds are weird sometimes lol.

I've tried a bunch of brands and TOP's pellets is hands down the best value. My Basil devours it.