I got 5 quail in the usps mail about 10 days ago. All appeared healthy. I made a cage of pvc frame/ 1/2" chicken wire. All males, I think bobwhite. One had blood on his back leg. I removed him. He died overnight . Another day, another bloody leg. Foot fine, knee and thigh not. This has repeatedly happened for about 10 days since getting the birds. No feathers on wire to indicate escape attempts. No plucking of each other. One of the birds had maggots inside his thigh. All of them have exposed bone. They die. I have one dying now, and one that appears fine in the cage. The first bird had green on his leg and I thought it was going through the coated wire. I put a board under because the ground was uneven. Then put dirt inside to protect their feet. Is this disease, abuse, fungus?