I'd probably be inclined to kill the other 6. The dog is one of my own, they're not This sort of statement causes me to reflect on what has gone awry with our species.
A dog will never write a symphony, let alone appreciate one. They will never provide insight into the nature of reality. Its capacity to produce, appreciate, and relate are so comparatively inferior, yet somehow humans will frequently elevate them beyond their own kind. I don't understand this. Dogs have been selectively bred for social compatibility with humans for hundreds of years. Their affection has been cultivated the same way grapes have been selectively evolved by humans for enjoyment. Pinot Nior vs. Sauvengion Blanc. Doberman vs. Chihuahua.
When people start valuing another species more than their own--let alone something as simplistic and inferior as a dog, I begin to suspect projection of a cognitively dissonant self-loathing. Somehow tossing human survivors overboard to their deaths is a sane statement, yet making an equivalent statement like, "I would murder half a dozen innocent sapient beings and feed them to my demonstrably inferior emotional toy should I deem it necessary" would be considered psychopathic. Bizarre.
Took longer than I thought, but no less amusing.