My brother in law has hunting dogs. They are not a tool, per se, because they have their own cognitive processes. But they sure are _useful_, trained, reinforced, and even bred for their purpose. They make hunting a lot easier.

My grandfather had horses. They are not a tool, per se, for the same reasons. But they sure were useful for certain jobs, at least until the widespread adoption of ATVs and such. AFAICT, they liked having a horse for the experience of riding the pasture w/ a horse vs an ATV.

I don't see such a distinction. I think domesticating things is a human inclination.

What's funny this time is that we might find the situation reversed, but I digress.