The paw is facing sort of. . Upwards and not outwards like it should be. Also, the highlighting on the ears are uneven, but should be even. The one on the left ear should be up a bit more. There should probably be one little puff of fur on its side since its side looks pretty bare. And some of the outlines overlap with the highlighting on the tail.
All of the coloring is pretty uneven and seems like it was done with colored pencils. The white outline around the ball on the tail makes the ball of the tail seem like it's flat on its left side.
Really, though, most of these are just minor errors. Otherwise, it's a really cute picture. I love the green bow. It just. . Goes. XD