It has taken almost a month but we have finally figured out "patience". I started with treat training and using the word "watch it". Eventually I could put a treat on my leg (while sitting) and he would not take it until I said "OK". We then moved on to feeding. I would make him sit, fill his bowl, and then put it down while telling him to watch it. Now, I can walk away and he will not eat it until I tell him ok. He is however a bit of an oger. You have to leave him alone or he will eat faster than he already is. Because we feed his sister at the same time (peetie) he would finish first and then go bully her out of the way to eat. We would have to lock her in the bathroom or upstairs until she was done. I can now tell him to "watch it" and he will not touch it.
His reward for watching his sister eat is that he gets to lick the plate clean when she is done!