Hey y'all! To those of you who use Autodesk Sketchbook to draw...do you know any good types of brushes, or mixes of brush types, that work well for animal fur?

I'm trying to do something a bit more realistic than my usual cartoony-type coloring, like what I did with my profile picture. I've had a great sketch with Spotpuddle and Redwillow of PineClan for forever now, but I just can't seem to find the right brush(es) for it. xD Thanks!