28 days is the incubation period. Stop turning around day 25, and raise the humidity as high as it will go.
How do your air cells look? What percentage of the egg space do they fill? Inadequate air cell space is a common cause of late-incubation loss, so start keeping an eye on them. If they are not developing well, you have time to help out by spritzing them daily and lowering the humidity (removing all sources of water from the incubator). Spritzing encourages evaporation from inside the egg by taking advantage of the polarity of water molecules (they are attracted to each other, so a light spritzing "draws" water out of the egg). Lower humidity of course makes it easier for water to evaporate out of the egg. You are aiming for approximately 1/3 of the egg to be air cell at hatch time.
If the air cells are growing too fast (if they are already 1/3 the size of the egg, for instance), then you'll want to raise your humidity and try to keep the incubator closed as much as possible between now and hatch.
Don't forget that when you stop turning the eggs, you want to also stop opening the incubator. High, consistent humidity is key to a successful hatch. Opening & closing the incubator messes with that in a big way.
Good luck! Happy hatching vibes coming your way!
Just a quick one this time, and forgive me if its been answered already. But does anyone know the incubation period for mixed and white khaki duck eggs? When should I stop turning them etc. I have them in a home made incubator but its pretty good, should I need to alter the temp or anything. They have been in for 20 days now, have been candled and they all look healthy and wiggling around. I cant wait to be a daddy! Im sooooo excited Im going to book the week off work they are due to be hatched!
