Last year we got our first back yard chickens. We got three from one breeder then a few weeks later added another from a different breeder. It wasn't long until one of the originals got Marek's and had to be put to sleep. Then this week the one we added from the other dealer also got Marek's and we had to put her down yesterday. Will all my flock face the same fate.or is there anything I can do to prevent it happening? The others at the moment seem healthy. In the spring of this year we added a beautiful Peking frizzle, I wouldn't have bought her if I had known they were still at risk. Any advise would be grateful received.