they are known for feather pucking when the are bored and have no toys to play with, or when they get no attention..which is why he plucked.
his previous owner went on vacation and left him with his(the guys parents, not marley's) parents who only fed him and gave him water, when they need at least 3 hours of "interaction" time..either playing with their owners, or being out of their cage, and with someone they know.
this guys feather have really flourished though, the feathers on his chest will never grow back though, as he damaged folicles when plucking, but his wing and tail feathers are growing back nicely