If you try look if one egg is fertile look for thisI think its better put 7 , to much holding and turning also dan Maybe demage others, but who knows.. i would put 7 eggs and open one and see if is fertile .. white spot in yolk. And if is fertile others are more likely be to
. My ducks are Indian runner x Cayuga and runner x appleyard. Great for eggs and meat which is exactly what I want.