I recently placed a dozen of my barnyard mix chicks and 6 I purchased from a seller into my Hovabator. I bought a hygrometer to keep tabs on the temp and humidity, which I monitored frequently throughout the day and night and made adjustment to regularly. I had an automatic egg turner and my bator is circulated air. I kept the bator at between 99.5 and 100.5 and the humidity between 45-55% the first 18 days. The candling at Day 14 showed only one of my 6 purchased eggs had developed, so I removed them. I found that 10 of my barnyard mix eggs were developing nicely so I removed the other undeveloped eggs and left the rest. At lickdown, I made the mistake of increasing the humidity to 85% thinking that was correct, only to re-read two days later that it should not have exceeded 65%. I corrected it immediately, but Iit was too late. I was heartsick to see only 2 of my barnyard eggs hatch. The rest died, fully formed inside their eggs. I just wanted to cry. 8 perfect babies gone. i wanted to post a picture of my "eggtopsy" because I wanted some experienced advice as to what happened and see if by the photos, you can advise me if this is the culprit. I know that during the incubation there were times when the temps dropped or spiked due to temps in the house, but I don't think it affected too much because they were fully formed. I have to deduce that they drowned in the last 3 days. I'm so sad.