whatever you do, dont give up.
we lost 5 out of our first 6 pure breeds to mareks that came with them from the breeder, cost a fortune at the vets and defra, then lost the next 3 pure breeds to the same.
now on hybrids, and they are fantastic, real characters, no fear, always looking for ways into the house.
it really can get better, we had maybe the worst start to chicken keeping that anyone can have, but it can get better, honest