Hello My flock had 12 hens and one rooster. I got them all from the same place just before they started to lay. It took about 2 months to get them laying and now I get average of 10 eggs a day and that started a month ago. So I figure the birds were hatch this last winter. a couple of days ago I found one hen dead. I took that bird to my vet and paid $170 and we sent it off to Texas A&M for a necropsy. the results came back today. She had cancer nodules in her intestinal track one of which burst the bowel and peritonitis set in. This type of situation is caused by one of 2 different viruses but I did not find out which one as that would have been an additional $250. the net result my birds will die. over the course the next year. If I bring in replacement birds they will get infected. The only choice I have is to cull all my birds or wait for them to die in the next years. even the eggs are good to eat but not to hatch which was my plan. They virus is not harmfull to humans and one of the two they got a vaccine that could administer when they are chicks I don't reminder exactly but I think one of the vaccine is call markus or something like that. So when I reload my coop I will make sure my birds are vaccinated .