Hi everyone from the (new) land of snow and ice! About 3 weeks ago, I cleaned out the nest boxes in our coop. Although there are 6, with 11 hens, there's never been a problem before, although they honestly only use about 4 of the nest boxes. Now, since I've cleaned them out of old bedding, feathers, and put in new shavings, with some DE (which was there before), they're fighting over one or two. Each box got the same treatment. Any thoughts on why they won't use the others?