has anyone ever had a baby zebra finch that can't fly? i have 2 babies that hatched and have never been able to fly. they try to hop as high as they can, but that's all. i separated them into a cage of their own. it is then that i noticed that each of them has one foot with no toenails. the other foot is normal. at first i thought maybe they had been picked on. but is it just a coincidence that they both have the same defect?