Ok so I am on Day 22 of my hatch they are a mixed bag of breeds from my layer flock. This is my second hatch and it is just a small one of 5 eggs. When I started this hatch I tried to use a smaller incubator I had never used before, it seemed to maintain the right temp for the first 24 hrs I had eggs in it, but then I could not get the temp to stay up. I moved the eggs from that incubator into my trusty ole one and all has been fine since they started wiggling a lot and development seemed fine as far as I could tell. I am now on day 22, i do not hear any peeping still and have not heard any, however, the eggs are rocking and rolling all over the place. I was wondering if maybe it could have been a late start to the hatch and that I am really only on day 20-21 of their development today? I have had a lot of people mention to me that my egg shells seem pretty solid, so I am also wondering if maybe the shells are too hard? I am only slightly worried at this point, but am looking to pick someone brain about the possible causes.