I have only this last year gotten into Coturnix. The first clutch I was so disappointed in their health we culled them all out and started all over again. This second batch is Jumbo browns. I have lost five hens during them laying eggs. Each of them has laid an egg and injured themselves so bad that they lot many organs and died! What is going on!!!???!!! Is this normal in the Jumbo Brown Coturnix? One was a dark range tuxedo. One was a Texas A&M. The rest Jumbo brown. Any thoughts?