A cockatiel hen & a Lineolated hen. Both have lost all feathers in rump area. 2 different buildings. Both of their mates are fine. Any Idea. Help please.
Please Find an Avian Vet to examine your birds to determine if this is a bird disease or what is causing this. Dr B can not help, because he would need to examine your birds to be able to tell what is going on.
Please do this quickly if you have more birds. You could be passing a disease from bird to bird when you service the cages.