All solutions - empty. Maybe she has a better place. The temp got down to 15F last night. Tacky was not in anything when I got up. Back to the drawing board.
I brought her inside for a while last night, to warm her up, hoping she might just curl up somewhere and decide to stay inside. She's a pretty cat and she doesn't need to literally freeze her ears off. Max (the neighbor's Great Pyrenees) has taken to chasing her, I don't think he would come up onto the porch.
When I let Jill outside this morning, she was afraid to go down the steps. The most I can imagine is that she had forgotten about frost.
Have a great sunshiny day!