I have watched my broodies with their eggs and they will often spend quite a bit of time off the nest. I have actually had eggs that were cool to the touch in a nest and still hatch. The big incubators also mimic the cool down cycle daily and I have heard that the percentage of chicks that hatched actually went up a tad after they started doing that.
By artifically incubating eggs the results will be the best if we can mimic how they are taken care of by a broody hen. To get the best results what you will have to do is to take the basic knowledge of how it's done and then tweek a system that works best for you. Everyone that hatches has a system and often times it took a while to devolop it. Just keep at it and take good notes along the way of temp. changes you make or humidity or whatever. Even the outside weather can have an effect on hatching.
By artifically incubating eggs the results will be the best if we can mimic how they are taken care of by a broody hen. To get the best results what you will have to do is to take the basic knowledge of how it's done and then tweek a system that works best for you. Everyone that hatches has a system and often times it took a while to devolop it. Just keep at it and take good notes along the way of temp. changes you make or humidity or whatever. Even the outside weather can have an effect on hatching.