I had to put PeachBoy back in his collar about 18 days ago. He was starting to pick on that right shoulder where his wing meets his back. I also put him on an antibiotic for 10 days.
He seems to be...
If you don't see any strings or things. I would go to an avian vet, it sounds like an infection of some sort. Also, are you getting rid of the old nesting material before another clutch is laid, ? ...