Marvelous Marvin is a very handsome 1-2 year old lab mix. Marvin has a lot of energy but he is very well behaved! He is awesome on a leash and he listens very well! He knows his commands and he is happy to show them to you. Marvin is a typical lab who likes to have things in his mouth. He is still learning to put toys in his mouth instead of hands and arms but he uses a soft mouth and he corrects very well.