I have four girls that will be a year in August. This far most have been doing good and laying. I also have four little girls that are a little over three months. They recently made the move to cohabitating and I changed the feed to unmediated starter. Since then the big girls have decreased laying. One has not laid an egg in almost two weeks! They have supplement egg shells and oyster shells. They don’t seem distressed...other than being annoyed with little hyper birds invading their space. Is it normal for laying to stop at this point?