Banti - I found one reference. If your chicks are fully formed but are DIS before pipping, it lists these possibilities:
- Disease or flock in poor condition
- Eggs chilled or overheated before collection (I think they meant before incubation)
- Low average humidity over the incubation cycle
- Temperature of incubator too high or low
- Incorrect or inadequate turning
That really narrows it down.
