Scientists are trying to find a cannabis plant which does not make sheep high.
Or at least making sure the eating of their flesh does not pass on those famous traits if they have been grazing on it.
Already trials in Western Australia and New South Wales found industrial hemp has shown promise as a summer crop for livestock such as sheep and cattle.
Scientists have been feeding cannabis from WA to a trial flock of 15 Merinos in NSW to discover how much of the psychoactive compound which induces the high ends up in their meat.