I don't know about the herd but I do know a bit about the one heifer. It was a double-blind clinical study that found NSD between THC and placebo. It maybe that THC is not the right chemical and thus, the raw leaf product may have the anti-nausea component or there maybe a synergism among components. But that's the burden of another test.

Aspirin was originally derived from an acid extraction of salicilate from Willow (willow=Salix, from which the molecule in aspirin gets its' name.) Various combinations of salicilates have been used as analgesics since before time. Companies manage to make money off of them to this day. Same with opiates.

If some extract of Cannabis were found to have medically valuable properties Pharma would be all over it.

B