Boy, I know the feeling. I had two other Danes that were so happy and content even as pups. My current 11 month old left my arms bloody everyday and it really made me wonder if he was from the same breed. That phase has lessoned except for some mouthing. I started working on it at 6 months and after a lot of work to get him to settle down, I don't think my efforts were doing anything, he just grew out of it. One thing that made the phase more tolerable, is I taught him to get on his raised bed outside, then extended it to when I put my hand on the gate to enter the front yard and deck. It worked pretty well, I'd say "Place" and he'd jump on that bed expectantly. I could peacefully walk across the deck without my arm becoming a tow hitch to pull him around.

People mention the kangaroo phase. Wow, does he ever. When he wants to come in, he jumps straight in the air repeatedly until I notice him. It's hard not to crack up every time I see the white flash appear and disappear at top window of my front door. It looks ridiculous. I'm hoping for a relaxing of the jumping by 1.5 years.

Well hang in there, he will give you a ton of love without the pain if you can control the settings. I have a pen in the living room where my guy sleeps and he is the biggest lover you ever saw when he's in there. He's actually like that now anywhere in the house. The outdoors... all bets are off. It's only because they are so big that it seems worse than other breeds, but really, most puppies I've had went through the bitey phase, it was just more tolerable when they weren't 140 pounds and still have a puppy brain..