I'm sitting here with my beautiful Welsummer hen on my lap. My husband just found her seemingly frozen to death this morning. It was 1 degree out last night, but the coop is insulated, ventilated, and has a heat lamp in it, and he found her halfway under the heat lamp, so maybe there was something wrong with her and the cold just pushed her over the edge. But her feet are still flexible and and she doesn't feel frozen. How long does it take rigor mortis to set in? Is there a chance she might come back to life? What should I do with her? I remember reading several reports on here of chickens that seemed frozen to death but came back to life once they warmed up, and I"m hoping that might happen here.