A younger Coturnix quail is laying circular cracked, indented eggs with darker area. Not sure who is doing it but it appeared after newer batch was introduced to the covey and we get one often, if not every day. Thought it might have to do with it being the first eggs. My daughter told me she has been throwing them out when she gathers eggs and I've seen a few more so I don't think it has stopped. It has been going on for a month or so with the same abnormality. Any ideas? Nobody else is doing it.