I have never had a case of Mareks in my flocks but recently had two 4-6 week old chicks in the same brooder exhibit possible Mareks about 2 weeks apart. If this contuinues and it turns out to be Mareks and there are surviving chicks they will be carriers. Should these surviving chicks be put down instead of being put into their prospective flocks so as not to expose other birds? I realize it stays alive for years and is in dirt and chicken dander but since I have not had it before and these chicks are isolated right now can I help prevent it further by not introducing those chicks to my very expensive breeding flocks?