Willy the Doberman humped Herth for hours in the barn until he cummed non-stop inside while knotting him, and while at it, turned Herth crazy and losing his mind. He craved for more humping, his ass hungry for a primal cock, a bigger one. So after Willy satisfied fully and release Herth from knotting, leaving his asshole totally moist and full of dog cum, Herth looks for Sam, Father's most favorite stallion in the barn, that already happens to be horny (indicated by a long cock already out from his body) and while at it, grabbed a bucket nearby to not let Sam's jizz go to waste.