Dogs in Moscow learn how to use the subway. At least one cat in London has learned how to take the bus to get fish and chips.
European pets must be smarter than those of us Americans. At least judging by our own critters, American house pets are smart enough to look cute and meow loudly when they’re hungry. And they know what claw clippers look like to run from us. Aside from that — if they get out of the yard, there is no way they’re smart enough to find their own way home later.
Links from Richard Dawkins.