We had a broody sitting on a batch of eggs and just 2 days before hatching due she came off the next and wrecked it - eggs all over the place. I retrieved the eggs - stone cold - and put them in a box on top of our boiler. They are now cheeping and starting to crack the shells. We don't have any equipment for this so have moved them into a large box with chippings in the bottom and have set up a halogen light over the top to produce heat. One hatched with a little help this morning but died within 2 hours. How can we prevent this from happening to all off them?? What should we be doing? Any advice welcome.