I think that I have been adopted by a dog fox. He turns up every day in my garden ,in fact he returned about an hour ago and he is curled up on the front garden, does he not feel the cold ?
I get fox and cubs in my garden too, last year they had an earth under a shed.
They do like to bask in the sun to warm up. I saw one come trotting through this morning looking for worms, I reckon.