I just candled again tonight and out of the 9 I have 1-10# 1,2, 4,5,6,7,8,9,10. Well the only obvious continued development I'm witnessing is #10, more veins tonight and very distinct, #9 I don't see veins, but at the bottom I do see like a red cresent that has gotten a bit bigger, but I can't make out any real distinct veins like on #10, so I'm keeping 9 until day 10 just to be sure, so I'm not sure what to think of that one. But eggs 1,2,4,5,6,7,8 I believe are absolutely no good, DUDS! Not one single vein, or red cresent shape, all yellow round yolk and the light radiates through out. Instead of waiting on the 10th day (today being 7th) should I go ahead and toss the ones that show absolutely no veins, just yolk? Also, I know I've been told not to add any more eggs, because it will affect lock down and not allow room for the other duckling, but will it still hurt lock down for 1 or 2 eggs to hatch since obviously no others are any good, if there is several new eggs incubating a week a part of this one if I were to add few from the igloo?? I'd like to have at least 2 ducklings to hatch to keep each other company. Especially if mom doesn't sit on the ones in the igloo if they are fertile. I heard 2 ducklings fair better together then alone. Or how will mom and dad accept 1 duckling if this duckling develops full term and hatches? But I'm hystatic with how #10 is coming along in development.