Well he looks a bit calmer here ;-) You composed this really nicely because I am immediately drawn to the left eye and this anchors the image for me. From there I am admiring his beautiful strawberry blonde fur (great color capture), then travel down that longish snout to bounce off the wet black nose. I like how you and Bob have managed to portray different sides of Jack's personality within the constraints of a tight head shot. Congrats on breaking the 5 barrier so early!
On camera flash doesn't help this image.
Try to ues a more imaginitive lighting setup. Either try to get your flash off your camera, or use window lighting or a reflector to make things more interesting and softer.