We are trying to save this egg as it might be the last surviving one. The mother hen and all the other eggs got attacked and died. I don’t have an incubator, so we put it under a heat lamp. We are keeping the temp around 99° to 100°. We are completely new to this! Any advice would be very helpful! From all of the pictures I looked at online it seems like it could hatch any day if it’s still alive. Please help!