how long should i keep my call duck eggs in the incubator for? 25 or 28 days?

[palomayayaya]

i read the standard time to keep ducks in the incubator is 28 days, but read an article saying that the amount of time eggs should be kept in the incubator depends on the breed. i then read that call ducks would actually hatch within 25 days. i’m having trouble deciding because the last 3 days you’re supposed to increase the humidity and i don’t want to mess anything up. i’ve hatched chickens many times before and have always kept to the standard 21 days and have been fine, but this is my first time hatching ducks and i’m really nervous so any advice would be appreciated, thank you!!

 

[BirdsBeesTrees]

My call ducklings hatch on day 26-28. I have to give them a safety hole and half the time I have to assist, or they will be fully formed and will die.