Sir Littlechin is an character from Wabbit: A Looney Tunes Prod. - Littlechin was a knight dragonslayer that became a dragonsaver.
Sir Littlechin wanted to slay a dragon. Bugs Bunny wants some peace and quiet. A baby dragon hatches from an egg that was mixed in with Squeaks' acorns. It grows to maturity in seconds while Bugs and Squeaks try to hide it from the knight. The dragon begins to fly and the knight chases it over a cliff, but the dragon saves him, so the dragonslayer decides to become a dragonsaver instead.
Wabbit: A Looney Tunes Prod.
- He has a white horse. The dragon probably became his pet too.