1 7 points: You wouldn't even think twice. You'd kill the dog and you wouldn't feel bad. Like Darth Vader, your heart died a long time ago. Now you spend your life spreading misery. You need someone to teach you to love again.
8 14 points: Sure, in theory it'd be a difficult decision. You may even think that you'd sacrifice yourself. When it came down to it, you'd kill the puppy. Don't be upset. You're probably making the right decision. There's a very slim chance that you're getting rid of a dog that'll be as heroic as Old Yeller, or Balto.
15 20 points: You couldn't do it. Not even close. You love animals too much. Not only would you choose the puppy over yourself, you'd probably pick the puppy over a family member. That's kind of crazy. Think about it, that puppy isn't going to cure cancer. It's just going to add more pee and poop into the world. A human might cure cancer alongside adding pee and poop into the world.