Milo has had black markings on his feathers since I got him. There have been improvements but only in new feathers. His new feathers have no stress bars thankfully. The black markings have not lightened or improved with his new more biologically appropriate diet and weight gain. I was just curious if I have wait till he molts to see any significant improvement or if I should be seeing results now. My vet says it could be do to me petting him too much but I'm unsure about that.