We have a puppy that is 3 months old (Newfoundland/Bernese Mountain Dog). He is very intelligent and he listens good but only when we are in side the house. When we are outside he gets dominant and doesn't want to walk and listen.
I know that I can't expect puppy's to listen inmediatly. But when he has enough (which is most of the time after 5 minutes) he sits in the grass and you can't get him to come along only if you're going back to the house. Last time he started growling at me.
I've never had this problem before, what can I do?