Very nice! Firstly, I would say, if your using this POV, lower the dog slightly (he seems to be floating slightly on the grass(nice grass BTW)). This would be really great if you put the camera at the level of the ball and had the dog staring right at it, you could then possibly use DOF. However, if you want to keep the camera where it is, add more detail. You could take some of that stonework in the background and use it on the edge of the water, then add some nice reflections, possibly. Hope that helps, good luck.