Finch putting his head back and falling down
I work at a pet store here, and theres a little finch that my boss is letting me take home to see if I can make him better. Hes a cute little Paradise Whydah Finch, he was fine right up until about two or three weeks ago and then he started putting his head back on his wings, and almost losing his balance, sometimes actually losing it and falling on the bottom of the cage. We gave him a vitamin/mineral stone and have been scraping it over his food thinking it might be a defiency, and also gave him a few days of antibotics and some apple juice. He seems a little better, but still doing it pretty regularly. What do you think I should do to help him?
Thanks for any advice