Tom...you say your loft is secure but is it secure form rodents?I have had my eight rollers for four months. One hen either laid two eggs or two hens layed in the same nest. The two chicks hatched and about three weeks later when the hen was off the nest, I noticed that both chicks were still in the nest but one of the chick was dead. It was feathered out.
Today I found a chick from another hen, that hatched about five days ago, on the floor below the nest with four or five spots on it that were somewhat bloodied. The nesting box is about five feet off the floor and the coup is secure. I am wondering if anyone can give me any clues to what is happening. Thanks, Tom