Our year old hen was put to sleep. We still have 4 hens (14 months old) and 11 chicks (2 1/2 months old). City vet said 80% chance they will be infected and die. Does anyone have experience with this disease? We got the hens for eggs, small scale. Its been a year since we got the hens from a friend that have a ranch. None were vacinated as being new to this, I did not realize this was needed. Plus we were given 11 chicks off a ranch that were just hatched and now these gals and guys are 2 1/2 months. All are still living, they have the entire yard to play and sleep in hutch separate from hens. How doomed are we to suffer total loss? They are more than chickens, they are our pets.