xs 2 Chick's are usually out w/in 24 hours, but the duck people all say ducks can take up to 48. If there are prominent veins there is nothing you can do at this point w/out high risk of causing a bleed out. No matter how many hours-duck or chick- those veins need to retract, and if that isn't done, they aren't ready. I fill my water wells and use a couple sponges atop the screen of the bator at egg level. We actually had 18 shipped eggs. 2 of which started and stopped w/in 24 hours. Didn't get any farther than the "blood Island" developing. One never had development and the other I didn't think had any development but last candle it looked like it to had a red circle like the blood island guys. But in all 14 developing is excellent in my book. Now if they all make it to lockdown and hatch that would be awesome.