We used to have a brindle coloured cairn terrier, years ago, when I was a kid.
He was a lovely little dog, but he got grumpy as he got older....a trait I'm starting to follow.
A woman who lived near my mum, she had one too....She lost it & was asking everybody, whether they'd seen it.
Turned out, he climbed into the wardrobe and got shut in....He sat there for hours, not making a noise, until he was eventually found.
By the way, no snow here yet.