Why 6400? The Fur looks great, I can see each hair!
That's just what looked best in the view screen when taking the shot. I tried a few different settings since it was a bright sunny day outside like an ISO of 12800 with a low aperture of f/5.6 and then another way with a 3200 ISO and an f/22 aperture but found the one I posted to be the best of the bunch.