Old dog! lol..yeah Jack's an adult but acts like a puppy most of the time except he stands his ground on certain things and growls like he's going to bite your head off at times.

Like if he thinks you're trying to force him to eat something he glares at you and growls a low, fierce growl. Then if you walk away he scarfs it down! He just wanted to eat it on his terms and not be forced to. He's so funny.