I lost one about 3 weeks ago in 20 degree weather. She was 8 years old. Maybe it was age but her 9 year old sister survived. She was actually still alive but she wasn't moving or even blinking her eyes. Just laying there. I made the decision to cull her instead of taking the time to try and rehabilitate her. It would have been really painful at that point to put her infront of a heater and she was so old anyway. When I culled her her body didn't even flap around. So that tells you how cold she was.