We do a lot of training at a local park where there is obviously tons of distractions... Dog really doesn't care about the other people, cars, bicycles etc... But if we go out there with my wife all bets are off... He brings every retrieve back to her, wont listen to a thing I say, and won't focus... Is this a puppy thing, or will this be a life long thing if we don't stop it now? Any suggestions (other than getting rid of the wife!)?