Help! My hens are in rapid decline, less than a week ago I noticed some swelling around their eyes, with a foamy discharge,so I went to my local feed store (no bird vet on the Big Island) and they suggested a spray for pinkeye. It's not working! I have them islolated, but they're not getting any better. Is it avian pox? Is it contageous? Do I have to cull the entire flock, some of the other 20 are exhibiting similar symptoms...HELP!