I have about 25 duck eggs in my incubator right now (1/2 topknot 1/2 roen) and the first duck hatched last week and is doing fine but all the other ones that have supposed to hatch arent developing right or something. Ive been leaving them in there about 30 days (the first one hatched at 27) and when I finally give up and help the duckling out of the shell its guts are on the outside of the body. This has happened with the last 6 ducklings. They of course die moments after they are out. The duck is completely developed and normal except for that. Has this happened with anyone else? Thanks