@CalamityJane,
He was pretty smart. Those eyes were very knowing..
On the other hand, I got him when he was older, who knows how old, at least six - so the training job wasn't difficult. On the bells, no training at all, he knew where the door was, went to it, nosed the bells.
I'm remembering how funny he was when I was leaving - he almost always went with me, and this involved my picking up his leash. He'd grab it in his teeth (good that it was strong leather) and jerk it around to get me to go in the direction of the front door. I forget now if I'd already attached it to his halter or if this happened as I was trying to do that. I think it was already attached. If I remembered that I'd forgotten something and let the leash go, he dance around with it, sort of snorting. Hilarious. He loved to go out.. he loved to come home.