He is a massive 22 pounds and loves to spend time at the dog park. He has a green argyle collar and the lady dogs find him to be very stylish. For your enjoyment, I've included an excessive amount of puppy pictures. Okay, so for my enjoyment.
And since everyone asks, Sheldon was named after a fish in Finding Nemo. Near the beginning of the movie you hear, "SHELDON! Get out of Mr. Johannson's yard, now!"
How fitting.