Are these eggs dead?

[threecreeksfarm]

Hello! I have a broody hen unexpectedly, these are about 15 days but I think another hen might of laid some more in there. I am not sure when she decided to start sitting as we were gone for Thanksgiving vacation (yes I had someone taking care of them for me). I just candled them and compared to my other broody hen these don't look good but I am a new chicken mama so I just need to be sure! Also if they are not viable, should I take 2 from my other broody hen (she only has 4 eggs)and put them with this one. I feel so bad for her if she doesn't have any babies! I thought hens only went broody in the spring/summer..lol.. last week it was cold, got down into the 20's but I have a radiant heater for them. Thanks for any help you can give me!

 

[PippinTheChicken]

The first two seem okay. I'd keep them.
Maybe the last one as well.
The others are either new eggs or underdevepoped