I have 3 old hens (1 is an EE that used to give us blue eggs). Only one was laying this past summer but stopped before fall. A few weeks ago one started up again. I’ve been getting 1 egg a day. Past 2 days, the eggs don’t look the same. Diff color yesterday. Today the egg is odd shaped and lighter. No other eggs except a white duck egg. Sick hen? Would one stop laying and the other start? Seems very strange!!