According to Margareta Bergman, of the Swedish University of Agricultural Sciences in Umea, however, this enhancement of growth is more than just the result of animal cutting and tearing.

ECONOMIST: Elk saliva stimulates plant growth

"Normally, perch are shy and hunt in schools, but those who swim in oxazepam became considerably bolder, " said ecologist Tomas Brodin of Sweden's Umea University.

WSJ: Anxiety Drug in Rivers Affects Fish Behavior