Action shots of dogs can be a real problem. Often with teeth showing, the tongue lolling, and the eyes rolling dogs at a full run can look less than cute. The best way to get the right emotion is to let the dog get tired so they slow down. Before getting out the camera play with them until they tire and calm down a bit. When they aren't straining and running at full speed it is easier to get them in focus and they will have more appealing features.
