I have 2 chickens and they've both been laying for nearly 3 months now and the other day, I found an extremelyarge egg in the laying box. The next morning, there were 2 soft shelled eggs in the box and 1 normal egg (from my other chicken). The next day, there were 2 more soft shelled eggs and 1 normal egg again. I'm worried since the chicken has been very tired recently which is not its usual behaviour. She seems to have a bigger back than usual too. I don't think the eggs are staying inside her long enough to get strong enough to be laid properly. The pellets they eat have calcium in them but now I've recency started giving them more calcium in different ways,. I'm worried about her so any advice would be very appreciated, thanks.