Now that we have his failing liver and recurring infections (AND the arthritis) mostly under control, my geriatric cockatiel is presenting with a new and mysterious affliction. The masses (lumps? clumps?) are on his back, where his wing is usually over the area. They're hard and white like chalk...

We have the bird since x-mass, we are trying to tame him but he does not let, when we open the cage he is hissing on us, but when I take him in hand he is calm, but he does not want to sit on finger or anything. :grey tiel: We where told in the shop that he is like 6-7 months old,is it possible...