they look a bit snapshotty to me, as you had the dog in one hand and the camera in the other and shot. not necessarily a bad thing - but my advise to you would be to get down lower the next time you have a chance to photograph children and animals. get on their level, it makes it feel more real.
i do love the setting, lighting and the little boys apperal. all good -
the focus is a bit soft for me though. but hey - who am I to talk today when I had a not so perfect shoot myself. you learn and move on and do better next time.
i believe you have a good thing going - i would love to see some more of your children work. Cat