You Have dog treats, I'm a dog...what's the hold up?
Can an old dog learn new tricks? To be sure, but not without much patient understanding on the part of the owner. Right now we're teaching Bubbles to "Stay" something she will do, only at the door. Its a slow process to be sure, unlike teaching Texas who picks up things quickly, Bubbles requires multiple sessions going over the same thing.
One of these day's she'll get it.