Rick climbs to his feet, grasping at his stomach. He starts towards the stairs, but a burning erupts in his bowels. He stumbles down on this knees then rolls to fall onto his back. He clenches at his stomach, crying out at the pain. He kicks and twists, while his body pains him.
His stomach begins to growl, and he lifts his shirt cautiously. He sees his fuzzy firm gut slowly twist, muscles beneath shifting. He cries out, digging his nails into his stomach trying to pull away the pain. His fingers seize up, tensing between fists and straining hooks.
He stares down his body, and sees his gut suddenly solidify, pulling to evenly spaced abdominal mounds. His voice quiets, raising to a high pitched whine. A meaty pop calls from his aching right leg. He sits up, resting on his elbows. His leg twists and grows, the pant leg becoming tight to his thighs. Several meaty pops spring from his left. He sees his foot distend to something remotely animal. A sudden pressure seems to press out from his bladder. Uncomfortable tension mounts in his groin. The seam of the inner thigh flies open from knee to groin, revealing a thick pelt of short gray hairs, with irregular patches of black, and his red boxers up about his groin. His arms pull out from under him, and he slams back, his head striking the wooden floor. He raises his arms to first see black thick nails at the end of every finger then mass of muscle upon the arms attached to them.
Rick pushes himself up onto his feet, forced now to walk on the front pads of his toes. He looks towards the stairs and takes a step. He hears the clopf of a thick nail strike wood. His eyes dart down. His toes were clenched together, the middle toe growing larger then the rest. His weight was tipped onto the black heavy nail that grew from the center toe. With shock he realized he had a hoof.
He felt his head jut forward, the strains of muscles of his neck forcing him to stoop. A pain flares in his head. Through the top of his vision, he sees horns extend to view. His ears felt as though they were pulling up off his head. Consuming his view, his nose flared and his face presses forwards. His shirt tore away, the ceiling ceased to seem so high. His cock sprung free from its inciting red confines at a proud new length. Rick staggered back on his knew hocks, his hands rubbing up along his amazing new body.
From up between his legs raise a bovine erection, and Rick spun with consuming lust towards his stepson's open door.