A friend of mine gave me a 2 rouen duck eggs (1 quit a few days ago) to hatch a while back and I counted 28 days on the calendar, becuz that is what I heard the average duck incubation period is, so this egg is due tomorrow and I locked it down Thursday. Today while adding a bit more humidity to the incubator I quickly candled the egg, and I see veins and everything but no sign that its going to hatch soon. Did I mess something up??? Advice please!!! Oh and I set it May 16th and its due tomorrow June 13th.