I have 17 pekin and ancona duck eggs in the incubator. On day 28, I candled all of them because there were no signs of hatching. I saw movement in all the eggs but 14 of them looked about a week behind in size. I bumped up the humidity and I candled them again today (day30) and 16 of the eggs were completely filled and look ready-i even saw one duckling trying to pierce the air sac. Is there anything I should be doing to vet them to hatch? This is my first time with duck eggs..