Thank you all for the info!
As for the treats, I usually cut up carrots into tiny pieces and he loves it.
I worked with him for a while last night and I can already see an improvement.
When he starts to bite, I get him to sit down and I can tell he's already getting annoyed with the fact that every time he bites he needs to sit, but he does it, for a piece of carrot.
I’ve heard a lot about the bitter apple spray.. I’ll pick some up this weekend and let you know how it goes.
Wish me luck.