Most of my pullets are 9 months old, most have been laying since October or so. Some molting going on, had a few rubber eggs in December, found in the poop bins under the roost. Today I found a rubber egg with a white, tub like membrane attached (about 3" long). Since the egg had broken in the nest box I tossed it before I thought to take a picture. They get 16% layer crumbles, treats, and scratch once in a while. They had been locked up in the coop late December and early January because of the cold, but have gotten out into the fresh air this past week. Should I be concerned? Don't know who the culprit is - can eliminate a few due to egg color, but have several suspects. No one seems sick....
