I just had 11 ducklings hatch out of 18, humidity went a bit low so the first one died half way out of its shell, the membrane was stuck over its eyes so I could even help. Duckling no 11 had a leg back and could stand so it had to be despatched but 10 healthy duckies, 5 white campbell (would have been 100% hatch if the membrane one had made it) and 5 khaki campbell, would have been 50% hatch if disabled one had been healthy, still, am happy with that.