My little boy, Toby, when he was 2 months old. Doberman Pinscher / Pitbull mix.
Now at 95 lbs and 2yrs old. He loves to play and has the mind of a 10yr old child. Smarter than any dog I know. He can open doors on his own and does a great job protecting the house.
Nala, our Dalmatian, now 7yrs old. She's the oldest and puts Toby in his place, even though she knows he's bigger. Food motivated and loves to be under the covers.