Pet Dogs

This dog might not be into SM at all.
Typically kept as a 'family pet' the Master is still Dom with him, treats him completely like a dog, and punish him when he has been bad, pets him when good.

Such a dog is almost certainly not into S&M but just being loved like a family pet.

This early example of  topdog was went be was being controlled by biker-Ed. The example in this case was just being content with my head in his lap and  feeling dead secure under his hand.