I'll try to make a long story short. Some critter picked off my hens to the point I have 1 hen and 1 rooster left. I miss my hens. (and eggs!) I got a Little Giant still air incubator. Temp holds very steady with 2 thermometers. 1 at 98 and 1 at 100. 1 air plug removed. This is my third batch of eggs. I've been setting in batch of 4 eggs as I only have 1 hen left. The first 2 batches each had 3 eggs showing good veining and then very healthy embryo movement day 8 or so. Then a couple days later would show bacterial ring and what appeared to be dead embryo - no movement whatsoever. 2nd batch I thought maybe I left the first batch gone bad in too long and maybe bacteria transferred over. I've been careful washing my hands before turning. This last batch now set on 8-25 I havent candled yet. There are no other eggs in there now - just the 4. I cant figure what happened the 1st 2 batches as they seemed so healthy. Too low temp? Too high humidity? Maybe inbreeding since both hen & rooster came from same straight run batch 2 years ago? I am such a newbie at this but I'm hoping 3rd times a charm! Any help or ideas would be greatly appreciated!