I thought I had found the answer! I decided to take my 5 month old V to the off leash dog park and it was wonderful. He played with other dogs had the opportunity to run full speed and he was exhausted and well behaved after exercising but I have also noticed new unwanted behaviors like growling when you just walk past him and he has a toy on his mouth. I used to be able to tell him things once and he listened now he looks at me like "I don't really have to listen to you if I dont want to." I find myself having to physically walk up to him and forcing him to do the command I am asking. I think that when he is around other dogs he is used to establishing his place in the pack with other dogs and now he thinks he gets to try to reestablish himself at home. Should i avoid the dog park? Can he go when he is older? Before the park I had been walking/running him for miles at a time but still cannot offer him enough exercise he just looks at me like "is this all you can do?" Anybody have alternative ideas on how to let him go and run free without the dogpark. I am afraid tat he will not recall if I just let him go in the woods.