I dont think you need the dog in there at all. Thats a great shot, nice and relaxed feel to it. The skin tones are off, the image has a certain style to it that would work in a different image, for e.g., something moody, but for this shot I dont think it works. The only highlights that are blown are on the white of the sleeve but that to me is inconsequential as its not the main focus. As for the lighting, I think its worked out really well. I would like to see an unedited version because I think you might just have over worked it that little bit too much. Aside from that, its well done. Good luck with it.