Nice shot!
My first reaction was that it was perhaps too centrally framed but looking at it for a little while i think it works fine this way because the body of the dog off centers the frame and balances it out.
Minor criticisms:
I think I would have liked to have seen a little more DOF on the face of the dog. The focal plane appears to be right between the eyes and both eyes are slightly out of focus his rear ear is completely out of focus. The nose is out of focus.
Also the bokeh in the background is the nice kind of bokeh, but just seems a little too blurry to me would do better with bigger shapes IMHO
So I'd dial it up a notch f/4-ish and increase ISO mainly for the facial features otherwise to see what happens with the bokeh does your new lens still give you those nice looking butter pools at f/4?
Best,
-Q