Our one year old Silkie Hen has been sitting on one little egg for 27 days. Its a nice hot little egg, when she comes out for a poop and a drink&snack we sometimes pick the egg up, very gently. We are getting worried about our little hen. When she went out today the other chickens attacked her (maybe 27 days is too long away from the flock). I rescued her, now she's back on the egg in her nest. What's the longest time for a Silkie egg to hatch? Anybody have advice?