I'm a member of a couple incubation groups on FB and there's a group called "Stacker Hatchers" they advocate no turning at all and place eggs from any number of types of fowl all together. I've always been under the impression that turning is vital for days 3-14 for normal development. Quail seem more tolerant of less turning, but anyone tried or had success with this new (to me at least) method?
I recently read a bunch of studies about optimal egg turning rates and the benefits of turning for the embryo and for hatchability. It made me turn my incubator up to the max, which is only 8x a day.