Literature has reported that humates block or reduce the production of stress causing hormones. This has been observed in animal behavior, in particular with show calves first entering the arena. Animals on humate are less affected by the outside stimulus of the crowds or confining areas of the arena. This effect has been noted on sheep, horses, cattle and hogs. In dairy operations, those animals not on humate aggressively eat their feed rations while humate animals leisurely graze. Laboratory testing at Penn State physically restrained rats by binding them to artificially create stress and measured hormones known to cause stress. Those rats fed humate showed significantly less amounts of those hormones.