Comment by SideburnsOfDoom

Domestication often involves lower intelligence. Particularly for farm animals.

Consider the statement above that tame raccoons need "TONS of engagement from their keepers because they get bored easily". Breeding that out means essentially a less curious, more complacent animal. Cows and sheep that easily figure out how to escape their paddocks are a liability.

Which category do you think is more clever: Wolf and coyote; or pug and chihuahua?

dog breeds considered "clever" often more closely resemble their wild ancestors. And they are often not "easy" breeds to own.