I'm sure he can be trained. Don't ask ME how, but I have no doubt that someone here will have some good advice.
I had to laugh though, b/c a week or so ago, I thought I'd train Max the "SIT" command, using treats. He picked it up so FAST....but now, he sees the treats, and he sits immediately before I even say it, LOL. I'm not sure exactly where I lost control of the situation
, but I think HE's the one who trained ME, hehe. They're very smart!