so we set 7 chicken eggs on December 3rd and we candled them today (9 days) and I am not seeing ANY development. I can faintly see air cells in most and can clearly see the yolk, but no veining or anything. The incubator dropped temp the second day but was under control within a few hours. Can anyone give me any advice on what to do? We are thinking of going again with more eggs, but don't know what we are doing wrong. The eggs are for sure fertile, I checked another one.