My African grey has unfortunately been plucking their feathers for awhile now due to dietary reasons which we’re trying to work through. Recently a dark circle has formed around what looks like a feather follicle and it looks infected (yellowish in colour). Thinking it might be a follicle my parrot has been trying to remove and maybe unsuccessfully so has started to become infected. (All conjecture of course). If anyone has any advice on this or experienced something similar please let me know. Have tried to clean the spot as best as I can however, will monitor if that helps and adjust tactics otherwise.