Yes they are chicken eggs. The temperature ranged around 97-100 so it did get lower than it should have been. Also, I went out of town and got back on the 20 day. The temperature was down to 95. So I figured that might be it. I know, I keep telling myself that I have to leave them alone until they look like all that are going to hatch have hatched. I haven't opened it since by the way. Also, do have any ideas on how to raise the humidity? It is down to 40%. I have two wet sponges in there. Sorry, I'm only 13 and this is my first time incubating chicken eggs (I have incubated and hatched duck eggs but I know that they have a few different needs...)