Went out to check on the hen, no sign. We just lost the roo the other day, possible predator. When I looked in the nest, there was one chick that hatched but was dead. No trace of the shell. If momma is gone, what if anything can I do to assure the other eggs will hatch? Should I gather them and place under a lamp at 99 degrees? (I think that is the temp). Update. The dingbat just showed up and is back on her eggs. BUT, this may be useful question in the future so if the above situation DID happen where momma was gone so close to hatching time, what would one do?