Hi, I just got my first Doberman almost 8 weeks ago. I have wanted one since I was 6 and now 22 years later I got him. His name is Achilles and he is a black and rust. I did a lot of research and preparing for him... Turns out I was not as prepared as a thought. He seams to be extremely intelligent and it was easy to train him to sit, lay down, stay (some what), shake, and speak. For what ever reason my wife and I cannot get him to stop jumping up on us, nipping, or keep him off the couch. We have tried everything, ignoring him, leaving the room, turning around, walking away (if you do this he jumps and bites you in the butt, and I have lost 4 pairs of pants and a few shirts to this), we have tried screaming ouch when he bites, and giving him a very stern no bite and redirecting him to some else to chew on. Nothing works, the longer you work with him on not jumping or biting the more he bites, to the point we have to put him in a play pen and ignore him until he calms down. I don't play rough with him, I don't chase him or let him chase me, he gets no attention when he is hyper, only when he his calm and sitting or laying down. I don't know what to do. I am worried he will not grow out of this on his own and I don't seem to be able to reach him. If he doesn't get better he will not be pleasant to be around when hes 80+ pounds. any help would do. Thank you!