(Brisbane, QLD, Australia)
Hello, I have 6 gouldian finches and 2 of these (males) are going bald. One in particular has been losing more and more feathers from his head - it started under the neck and the balding has now progressed all the way around his beak and head and continues to worsen.
Behaviour is normal and the birds are active, singing, eating as usual. I have not seen any signs of pecking in the aviary either. Diet consists of seeds, millet spray, cuttle, fresh veges, vitamin water, occasionally egg and recently I tried adding a little powdered kelp. I'm attaching several photos for reference, however the feather loss on the head is now worse than pictured.
Thank you for any help.