I am new to quail and I have a problem. I am on my 2nd batch of bobwhites, I only have 7 in my brooder and 6 that are about 3 months old. The 7 I have in the brooder thay are picking at there feet so bad they just lay around most of the day. Some of there feet are really bloody and only hop around on one leg. I did not have this problem with the bobwhites I had before. What may be the cause of this? Thank you.