Hi swissysRock, it sounds like he is in the teenate stage, and is trying to "get his way", it is fairly common and of all the dogs I have had, I think it seems to more of a problem with the guys. Have you every tried or used a "clicker" when you train him?? I love them, and to combine the clicker with a real nice treat. It is a loooot of different training methods out there, one trainer I had, that used the clicker, said that a good way, was to have the clicker and a treat, let the dog know there is a treat, and then say "sit" (or whatever you are training) face him, let him know there is a treat too, but do not repeat the word more than two times, just stand there, when he finally does it, click as soon as he puts his butt down and then give him a treat. We did that a lot, and it seemed to work on most of the dogs in that class. I think the principal is that a dog does not like to be ignored, and wants the treat really bad, but tend to get death if you repeat it too many times. The dog I took to this perticular class, was a foster border collie, who was extremely timid and shy, so it was a perfect way to train him and worked real well, but there was also puppies and older dogs not all of them got the concept lol..... There was a few that just seemed to think "ohhh well, you stand there and I stand here, lets see who gets tired first" so obviously not working on all dogs. I used to compete with german shepherds and back then it was no clickers and a little bit more demanding training, so I think it is a matter of finding the method that workes for just that dog. Good luck and let us know what he decides to do, go back to being a good puppy or continue to be the bratty teenager (have one of those at home, a twolegged girl and ouch.... I know how bad it is)
Marit