Can anyone recommend a good book or books to help with resource guarding? I have tried to read through as many threads on the forum as I could on it, but I think we are going to need even more help. We recently began having quite a problem with it.... I'm not sure where we went wrong, but I do know that we need to get rid of this behavior.....

I have been trying to use positive reinforcement training, for instance when I want him to move, giving him the command and then rewarding him or having him drop something and giving him the reward (This has been going pretty well).