Aksherly, there's quite a bit of developmental evidence that the whole
reason hemp produces THC and related compounds is because ungulents
(like cows) _hate_ the stuff.
On the other hand, hemp is farmed in the EU; it's not hard to breed a
strain of cannabis sativa that produces no intoxicating substances
whatsoever. (Although the cops tend to keep a close eye on farmers who
have a license to grow the stuff, just to make sure it's an approved
strain ...)
-- Charlie