“Car” When we are walking in our neighborhood (there are no sidewalks) I’ll say “car” and he’ll move into the grass area when a vehicle approaches.

I heard you could train your dog to tell you when they need out by putting a bell on the door. I didn’t have a bell, but did have empty beer can and random nuts and bolts.

She learned to knock over my beer if she wants out.

I taught my pet rock to "stay" in 1988.

It hasn't moved since.

It wasn't a command, but I distinctively remember the first time my cat growled at me for picking him up and I set him down immediately. Now it's his way of telling me to let him down whenever. So I guess he taught me the command instead!