The necropsy report showed that my hen had multiple lesions and that one part of the sciatic nerve with a tumor looked like Mareks. This hen was approx. 15 month old buff Orpington. I have other chickens and I was wondering if at all there is anything I can do? Do I just expect the worst and hope for the best? Do these tumors grow fast or slow? I have 11 that I was told were vaccinated they are approx 5-7 months old. 2 non vac. Hens 9mths old that came with the one that died, 15 mths approx. not sure if vac. 23 that are probably not vac I am not sure. They are over a year but that's all I know. Is there anything I should look for? Also 18 are in seperate area from others as I got them in July. I had one of those die 8-6 from malnutrition according to report. I got them from someone who wasn't taking care of them. I had the buff just die as well as an Easter egger about 10 days ago. Easter egger report showed peritonosis or something similar I do not have word here. They did not say Mareks something about yolk. My neighbors chicken died also 8-11 said ovary blocked I did not see final report yet. I sometimes fed those chickens when they were gone. I am new to this and it seems weird 4 chickens dead in a month.. I read somewhere that older chickens don't usually get Mareks but obviously not the case as my buff was older. I just need to know what to expect... Also should I wait to blend the flock together as one? I have had them seperate, I wanted to find homes for the 3 roosters he had and then out all together.. Thanks and sorry for the book..