My calls hatch consistently on day 26 whether it is the incubator or under a bird.
Lockdown on the evening of day 23 or day 24. If yours hatch on day 28 then lockdown on day 25 or 26.
I raise call ducks. This breed has been so modified by selective breeding that many ducklings are unable to hatch on their own. Through selective breeding the bill of calls is much shorter. This short bill makes it hard for the ducklings to hatch on their own. With my last hatch of 15, only two...