Hisss

I love this so much. <img class="avatar" src="a.deviantart.net/avatars/i/l/i…" alt="" title="IloveItplz" />
I find it very visually appealing. The color scheme on this guy is awesome. The greens nicely complement the browns and vice versa.
It's not all HOLYMOTHEROFGODBRIGHTCOLORS!!!111! like a bunch of fursonas are. I love furries with nice, even color palates.
However, if you wish to portray hissing feircely, I would suggest opening the mouth and adding sharp teeth and snarl wrinkes on the muzzle/face. If you're just going for the cat-style WTF movement, then just keep it the same and don't listenn to my stupid yammering.
Overall, I really love your work. Keep it up!
~ <img src="e.deviantart.net/emoticons/h/h…" width="15" height="13" alt="" title="Heart"/>, PTZ.