Right now, I am training my aunts dog (a lab/dalmatian mix, I know, that is a HUGE difference) Anyways, persistancy works. I almost gave up with the training when Alex went backwards! She had learned sit, and quit jumping, then she turned around and started jumping and wouldn't listen to me! I just kept on, and "retaught" her that when I say down/no/sit, that is what I mean!

All I would say, is use positive words, and I have found that showing what is good to chew on (a toy) and what is not good to chew on works very well. Never use negative training.

Try to take a ball or a favorite stuffed toy and get his full attention by tieing him up in a little area where it is just you, and telling him sit. After he sits successfully (you might have to make him sit for a couple of tries) you give him the toy and play. After about a 3 minute session, give him a 5 minute break of offleash time and play time, then do another three minute session. Do about five three minute sessions a night. Thank you for not giving up on Scrappy Doo!

Good Luck!-
Steph (and the gang)