I have 8 laying hens, all laying since late fall, early winter. Their eggs have been almost perfect with just one or two odd ones over the months. Now, within 2 days I found a rubber egg in the nest box and 2 under the roost. I don't feed layer feed because I read it was too much calcium for roosters and younger pullets. They have organic grower feed, they free range and always have oyster shell available. Any ideas?
