'Tail and Genitals,' is the next prompt on the tablet screen.
James grasps Gabriel's tail firmly at the base, causing him to lurch forward from the shock as the feeling goes straight up his ass and into his spine. Leaning over to the wall to pump some lube onto his hand from a mounted container, James ensures two fingers are thoroughly lubricated before he eases them into Gabriel's rear passage. Gabriel whines and attempts to buck James off, but yet another zap emanates through the collar, which causes him to settle. James says nothing as he prods around in Gabriel's rear feeling the place where the tail has been so firmly embedded. As he continues to feel, James states, "Tail placement is firm and secure, the TailSpin 3.0 has taken well to this dog. There is no residual inner swelling, the site feels smooth and healed." James slips his fingers out before replacing his gloves with fresh ones and once again, pumping some lube onto one gloved hand.
Gabriel, a previously tall, muscular man knows the position he's landed himself in, and knows he can do nothing as James reaches in between his legs and grabs both his cock and his balls to feel around. "Genital region also has no residual swelling, testicles feel weighted and heavy - which is an excellent sign that reproductive boosting has been successful. Increased sperm production is yet to be observed. Penis size remains the same - initiating knot testing."
James shifts to kneel on his knees behind Gabriel, for a bleak moment, he thinks that James is going to use his rear entrance to satisfy himself - that doesn't happen though. Instead, this man that is shorter than Gabriel but the male that is unquestionably in control of this situation, leans over him on his all fours. James' chest is to Gabriel's back, left hand on the floor beside Gabriel's left hand as he reaches his right underneath him towards his crotch.
James grasps Gabriel's cock firmly in his right hand and begins to stroke it - none too gently. Gabriel's arousal quickens swiftly, a flush rising to his cheeks as he feels an intense urge to start fucking. James pumps Gabriel's cock for no longer than 10 seconds before Gabriel can no longer control himself, his animal instincts taking over. Gabriel begins to thrust into James' hand, the full length of his cock being squeezed satisfyingly in his firm fist. "Yes, that's it. Good boy, Gabriel," James praises. He whines and moans as he continues, he is surprised to feel his balls drawing up already in anticipation of release. He feels pressure building at the bottom of his shaft, he drops his head to look between his arms and down to his crotch. He watches himself as he fucks into James' hand his cock turning an angry red with arousal, spurting streams of pre-cum onto the floor of the kennel. He sees where the pressure is coming from at the base of his cock - a monstrous bulge has began to form, swelling rapidly the more he feels the tingles of an orgasm threatening at the base of his spine.
James feels the bulge beginning to form too and as he widens his stance for balance, he places all of his weight on Gabriel's back, he can take it easily. He reaches his left hand back and firmly grasps and squeezes the knot beginning to form at the bottom of Gabriel's shaft. Gabriel goes wild with this extra stimulation, grunting and bucking manically into James' hand - rutting to chase his orgasm. James squeezes his fist firmly around the knot and Gabriel howls as he bucks forward one last time, some instinct telling him to stop thrusting with the pressure around the bulge, seconds later, a torrent of cum starts pumping from his cock. James rhythmically squeezes the knot as he strokes Gabriel's shaft soothingly, while he continues to spurt onto the floor.
Gabriel's head remains dropped between his shoulders as he breathes heavily, a blush of shame rising to his cheeks as he looks at James' hands still milking his cock into the puddle of semen on the floor. He has just been made to rut and cum - just like the animal that society will no legally classify him as. He feels that his dog status has been sealed.
James moves to perch back on his heels before communicating to the tablet again.
"Gabriel's genitals are extremely responsive, his knot large and firm. Gabriel came in just over a minute with manual stimulation. His knotting impulse is strong, the male stopped rutting once firm gripping pressure was applied and release followed shortly after. Copious amounts of sperm was expelled - testing of sperm to ensure potency will occur from a sample taken. Rutting with a female will be tested tomorrow."
At that, James scoops up a sample of semen using a small capped vial, removes his gloves, picks up his tablet and leaves the room with no more than a quick backward glance at Gabriel, still standing on his hands and knees with a throbbing cock, knot and a puddle of cum beneath him.