Last month we lost a chick to Mareck's disease. Saturday, another, at about 14 weeks of age, had stiffness in its foot. We feared a repeat of what we had gone through with the other chick, so brought her in the house to separate her. She is not improving, but becoming more paralyzed in that whole leg. My question is...how long does it take for symptoms to show in other chicks? This occurrence was a whole month after the first! How long will I have to wait before I incorporate these pullets in with the existing flock? I was going to wait till spring, but that is really only 6-10 weeks away! Has anyone had this happen, where there was a month interval between cases of Mareck's. Thank you.