my bird has developed a growth on his left wing that has continued to get progressively worse. He never had any problems like this before. I know in order for it to have a chance to heal he must''''''''nt be able to pick at it, which he is constantly doing now (except when sleeping). Any idea on what my bird is suffering from?
Optional Information:
Age: 5; Male; Breed: cockatiel
Already Tried:
water