Read some of the other forums on here about homemade incubators. You can actually finish out a hatch with a heating pad, a light bulb.....there are a few different ideas out there. The way I look at it, if you don't have an incubator trying one of the other methods doesn't hurt anything if it doesn't work after momma has left the nest.Okay so my first egg is due to hatch today! Two more tomorrow, then the last on Sunday. Without an incubator, what shall i do if my broody gives up on the last egg?
Also I can't help but think.. How to the baby chicks breathe under momma? I am dying to know if they have piped.. I'm dying to peek! Lol
But, usually if she can hear or feel the last egg(s) moving around, she will stick it out for a little while longer. But if she leaves, you need to snatch them quick, especially if they've started to pip as they can dry out and chill very quickly once her body heat and moisture is removed. Wrap the egg in a warm, damp towel (don't smother it and not for long) and get it under some heat. By my estimation, she may leave right before these hatch.
Good luck and let us know how it goes!