I have a hen who is about 24 weeks. She just started laying and she laid 2 eggs on Saturday and both were soft shell. I thought it was from her just learning how to lay but today I found 2 more from her. One egg is usually intact but soft and the other is broke open. It was like that both times. All of my other chickens lay fine. I give them ACV every other day and they have free choice on oyster shell. Any ideas on why 2 eggs and why they are soft shelled? I am truly puzzled!