Hi prima!

I didn't start puppy classes with Oz, until he was 4 mos old due to
some unexpected job responsibilites, but if memory serves I
believe they can't start until they're 10 weeks old and have
completed their 2nd set of shots.

I use to run around the yard and have Oz chase me.
It's a good opportunity to naturally teach them to want to
come to you, while they're puppies. Once he was running
after me, I'd stop and kneel down and call him to me. He'd
come bounding into my arms, then we'd start all over again.
There was never any growling or attempting to herd me though.
Maybe that's because I had control of the game, by calling him
to me. Not sure. If he growled though, I'd stop the game.

One of the first commands I taught Oz was sit, because he
was jumping all over me for his treats too. He now has to
sit calmly, before he gets his dinner or a treat. I've just recently
started doing this with his toys, when we play too, because lately
he started jumping and lunging at his toys. After a few
scratches, I decided I needed to stop that pronto, so we've been
working on that the last week and he's getting much better.

For the chewing, try a sharp "Unt Uh" vs. "No". I find dogs pay
attention to that sound better than "No". Then right away
give him something you want him to chew on and praise him to
high heaven, when he's chewing on that.

Par...