We had one chick hatch two nights ago. He soon figured out how to get out of the nest, mom followed to take care of him and left her eggs. Another hen then babysat the eggs for her When I discovered all of this I put mom and baby back in the nest and they were ok for about 12 hours. I've had to put mom and baby back on the nest about 4 times since (48 hours) and still no more chicks. The eggs haven't been abandoned for long, I have had to lock them in then let her out every few hours for food and water. She's a great mom to the chick but she still likes her eggs too. She's most happy when sitting on both. So my question is, how long can eggs be cold before they won't hatch? and how long should I keep doing this?