Riley the Mixed Breed

Dog Breed: Border Collie / Jack Russell Terrier

At one year and three months old, Riley is still more puppy than dog. He's got a ton of energy, probably due to his mixed breed heritage. Our best guess: Jack Russell, border collie, and beagle. He sniffs, he barks, he herds, and oh boy does he play! Riley is a handful -- two handfuls, really -- but he's also the best thing that ever happened to us.