Hey. I need some help here. First time trying to incubate duck eggs. I'm on day 20 and I'm not sure if my eggs are growing or what. I've read every Web page I can find but I still have concerns. If I can figure out how to post pictures I will. One of my eggs that I could see movement I yesterday now has no movement and has a thick dark reddish "vein" across the fat end of the egg. Another egg that was moving yesterday is completely dark inside and seems as if the duckling has filled the entire egg. Air sac is fairly large and seems to have grown. Do yall think that one should hatch soon? Any advice is greatly appreciated!!!!