I lost a chicken recently to a dog attack. Her last egg was laid on the 16th. For sentimental reasons, I'm considering setting her last egg. Taking into consideration the lay date, how much longer can I wait before I can expect ANY chance of hatching? Reason I ask, is because I have a few eggs going into lockdown tomorrow, so do not expect a chance to set until Sunday....making it days since the egg was laid... The egg has been sitting on my counter since it was laid, in a house that has probably varied between 68 and 75 degrees.