Candiflare
Mama Doe
I agree with Jane. IMO she should have been admitted and put on a heat blanket or wrapped in veterinary heat wraps and given fluids sub-cut or IV to get her fluids and sugars up. If she's back with you now I would have her in a warm room on a heat pad and wrapped up in blankets or held for body warmth. Keep her eating and her fluids up too - whatever the vet says, a hypothermic bun is normally a bun where their digestion has ground to a halt and as a result they become internally dehydrated (in the guts) even if peripherally they seem normal.
I totally respect both of your opinions and have called my friend who is a vet and he's coming round tonight and will admit her locally once he's decided how she is.