Featherless and yucky bum
Hi, I have a male white fronted blue scarlet and he is around 18 months old. He has been happy and healthy since I got him and has been happy wandering around on the floor of my aviary and flying from perch to perch, but within the last few weeks I have noticed that he has a bit of a yucky bum. His feathers which were once there are all gone from his rear end(nearest to his but) and has been increasingly sad in the aviary.
What can I do to help him? He is in the aviary with a few zebra finches and a few canaries, they all get along rather nicely most of the time. Please help.