We have a female dachshund named Zoey. When we leave the house we usually lock the dogs in the laundry room. They have a doggie door to go outside. We lock a side gate to keep them out of the main part of the back yard where the pond is just to be sure they don't fall in. When I go out to close the back yard gate Zoey always follows me outside to investigate what is going on. She chases away all the lions, tigers and bears in the back yard to keep me safe.
Anyway the point of the story is that on cold days she will not go outside with me. We call that temperature below "Z".