goosebumps: Please Don't Feed the Vampire!

You buy something called "Vampire in a Can." At first you think its just a goofy vampire costume with a cape, plastic fangs, and a tattoo of teeth marks. But then you find a packet in the bottom of the can labeled: DANGER-KEEP AWAY! If you try to open the packet with your teeth, it rips in your mouth. Uh-oh. Looks like you've been transformed into a vampire-and you're really thirsty. If you decide not to open the packet, your dog sinks his teeth into it. Now your cute little poodle has become a ferocious vampire dog! Can you save your pooch before th bites off more than he can chew?