Unlock the extra moves by winning Doggy Doo games:

Effect - Action

Sit down - Press Down.
Lie down - Press Down while sitting down.
Sit up - Press Up while lying down.
Stand up - Press Up while sitting down.
Shake body - Press Left, Right, Left.
Beg #1 - Press Left, Right, Up.
Beg #2 - Press Right, Down, Up.
Beg #3 - Press Left, Up, Down.
Beg #4 - Press Left, Left, Right.
Beg #5 - Press Left, Down, Up.
Poop - Press Left, Right, Down.
Pee left - Press Left, Down, Left.
Pee right - Press Right, Down, Right.