Apparently if the birds are older when they're exposed, they can sometimes resist it. Our older birds were fine, but they were vaccinated as babies. The ones with Marek's seem to die at about 6-9 months. Afterwards we cleaned the coop and brought in new chicks the next spring, with all fresh...
We've had chickens for twenty years, and whenever we got new chicks they blended in fine with the rest of the flock. Not this time, though. We have 18 mixed breed girls and their rooster, Brewster, who are three years old. And we have 8 ladies and their rooster, Harry, who are last spring's...
Hi Melissa. It sounds like Marek's, sorry to say. I lost 9 birds to it one year, and now only buy vaccinated chicks. Your coop is infested now, so any new birds should be vaccinated, or they too will catch it and die.
