I've just finished hatching my first brood, I managed 76% hatch (from 92% fertility). I had some full term 'dead in shell' embryos, and wonder what caused it. Half of those had started pipping and half handn't. Is it ever possible to get zero dead in shell embyros? I know you can cause problems by opening the incubator causing them to 'shrink wrap' in the shell. But what about other factors, like other baby quail chicks playing football with the other eggs like mine did (til I moved them). And here is the first one that hatched.