Each dog that joined my pac has had its own unique personality. Mac is like Cino - a spitfire. A puppy who barks when he does not get what he wants. If he finishes a bone, he will bark until Bean voluntarily gives up his bone to him. Bean is patient, usually waits out Macs behavior and then get what he wants. He will vigorously defend his food, but gladly switches bones and happy to observe.
Cino is 90 pounds - so I have always been careful with her interactions with puppies. Mac is by my estimate about 42 pounds and he is ready to take on the full cino. Mac love engaging cino in play. Mac is a tail biter - hence his nickname Mac Attack for sneaking up on dogs at play group biting their tail and running away.
About the photograph
Despite a shutter speed of 1/320 - we did not freeze the action, but does the blur take away from the emotions that the shot conveys. Not sure. Would love it if there was sharpness around Cino face, but a pan was not going to achieve that
Lesson learned - make sure you are shooting at higher shutter speed with the my speed demons and playing chocolate lab and spitfire labradoodle puppy.