2 of my roosters have bad bumble foot. We tried treating it when they first had it, and took one to the vet. It didn't; get better. We could not find the kernel. Last week, I took the roosters to the vet and was told that it was too far gone and that I should put them down. The roosters are still mating, and eating. They do limp..... I can't kill them, I can keep draining the foot, but it won't stay better. any ideas?