I have the samething happening too! I bought chicks in March. From a hatchery down the road. I got 2 silkies 2 barred rocks, 2 polish, 2 Cochins. These being our first chick they have become our pets. Later I added 3 more silkies, 2 golden lace chicks. All chicks being 2 days once we got them. One of the chicks got sick when it was young, so we went to the vet and she gave us Tylan and told us that should help. We gave it to all the chicken as a precaution as the vet recommend. The chicks all had medicated chick feed, apple cider vinger in their water occasionally. Still that sick chick eventually died 2 months later. Then about a couple months later I lost a silkie no signs of illness at all. I brought her into the house into a kennel for love and care. I just ended up watching her die. It was too late. Since then I've lost a 4 in total! The last one I thought I cought in time. I noticed she wasn't hanging around with her buddies. So I didn't question it, I brought her in and after 3 days I thought she was doing better so I put her out in the coop. A week later found her dead. So far it's only been hens dying so I thought it might have been something to do with that. Then yesterday when I went to let the chickens out a rooster was dead! None of the chickens were laying yet. They have a large coop, a large run, but they free range all day then get put in at night. I just don't have a clue what it could be?
