This is just a bit of fun because I know no one can really tell.
My cat Krikkit came from Cats Protection early last year who had him down as a domestic medium hair (aka moggy). However at just over 2yo he appears to still be growing (4.7 kg now and not overweight as far as I can tell). He has also put on an excellent winter coat in the last few weeks.
This has led me, DP and the cat sitter to speculate that he might have a bit of something else in him (possibly norwegian forest cat).
What do you all think?