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It's a big yard, but he is a little fellow, yes, plenty of spaces to get out. Cats love their homes so I really hope he's well and not taken, as he is such a beautiful puffy cat ;)

Yeah, cats usually get back home but when they're that small they can become lost very easily.

Let's see. It was a cold night, -5 C... Fingers crossed he's well.

If he doesn't appear, put a few posters on the area. It's possible that someone thought he was alone and took him home.

Thanks, mate!