for. The obvious reason would seem to be diet – particularly the softfood. However that does not begin to explain why you can have adjoining pairs, on the same diet, and one nest is dirty and the other one is clean. Even so we have found that
It is not easy to decide what to do about a hen that appears not to be feeding her chicks properly. If you panic, you can finish up with more chicks being fostered than are with their own parents.