Great! He looks so bulky now, just how he should be, and his expression really tells a lot about his character.
I think it's with this piece and the Thistleclaw one that I notice how much you have improved at drawing cats! The heads are a perfect size and your lineart is getting cleaner and cleaner! I also like how you've toned down their shoulders a bit in the art you uploaded just now, it's much better, I think! : D