I have two hens that became broody, one of them hatched a healthy chick. They both had up to 12 eggs under them. It's starting to get really cold out so I took the eggs from them and put them in a incubator. I tried to candle them and havent had much luck. I noticed when i would turn them that i could almost feel a fluid rolling around inside. Is that normal? some of those eggs also feel lighter then the others, and when i was candling them i could see fluid moving around as i turned the eggs to look at them. I dont want exploding eggs and i am new to all of this. can someone please help me.