I just took in an adult chukar partridge from a neighbor who is dying of bone cancer. He has been feeding him like a chicken - lettuce and bread and birdseed and cracked corn and water. Is there a vitamin supplement I can buy ( and where?) and what can I add in? I gave him sunflower seed and he seems to like that. I offered him grapes and apple but he does not seem to be going for it - gave him some dark greens - not so much. He needs to be built back up so please give me solid advice of a variety of things I can help him with...and swollen feet! Thanks.