Hello all! I have 1 female pekin and a male & female mallard. They are all 6 months old. Both females are laying and they've reached 22 eggs (pekin has laid 10 including 1 double yolk and the mallard has laid 12) so my question is Is the mallard old enough to sit on the eggs?? Should I get an incubator? How long after laying the last egg will she start sitting?? Also they are both laying in the same nest so I take it my pekin is "dumping" her eggs off for the mallard to sit on.