Well I'm not sure that's the case. She says she has raised chickens for 8 years now and she still doesn't believe its Mareks. But all of her birds ar vaxxed for it and I chose not to vax for it. I am a new chicken mama(22 weeks now), but after some hasty research ..to me it looks like Mareks. I'm sad but what can I do? If he does indeed have it, it's all over my land and coop already with years of sticking power.