"Damn!" Jacob stared at Henry - the young man looked more like a teenager than someone in his early 20s. And his medium-length brown hair seemed much shorter and lighter. "You look like you did in high school!" It was more than that, really. Jacob blinked and stared harder. Henry's forehead was falling back into his skull! His head was collapsing behind his eyebrows!
Henry was still staring back at him. "Me? You look like something out of a bad werewolf movie!"
Jacob reached up suddenly and felt his face. Silky fur was spreading over his cheeks, and his nose and mouth were pushed out several inches. "Shit!" He realized that Captain's forelegs were wrapped around his waist, and the dog was pumping the air behind him. We're turning into dogs!"
Twisting around, he shoved Captain away from him, sending the big dog sprawling backward with a yelp. Unfortunately, Jacob found that his body was moving awkwardly in too-tight clothing, and fell to the ground himself. The German Shepherd was on him immediately, trying to hump him again.
"Get offrruff!" The words turned into a bark, but Jacob still managed to throw the male off again. Captain growled this time, the fur on the back of his neck bristling. Jacob pressed his rump against the side of the enclosure, and found he was growling back.
Captain leaped at him again, this time grabbing Jacob's T-shirt in his teeth. Yanking back, the dog pulled it free and shook it angrily before tossing it aside and coming at Jacob again. This time, Jacob shoved him back with difficulty, his arms not bending the way they should. He tried to stand, but his pants slid down suddenly. Jacob looked down and stared. His waist had shrunk and changed, and black fur swept down his belly and legs.
Captain grabbed his pants leg and yanked hard, throwing Jacob off balance again. Once more he was on the floor, this time naked as the dog pulled his pants of what were now canine hindquarters. A quick glance confirmed that he was still male, though his sex was almost fully canine.
Stunned, Jacob didn't react at first when the German Shepherd hopped on him again. Then he felt strange heat inside, and saw the sheathed penis start to shrink. Captain was turning him into a bitch!
No! With a snarl of rage, Jacob threw the dog off again and followed up by pouncing on the startled animal. Although he was more dog than human now, Jacob still had more size, and he was able to pin the dog on his back. Captain yelped as Jacob's lengthening teeth clamped on his throat, and then went limp.
Jacob let go and backed away from the submissive dog, hackles raised. He could feel himself changing rapidly now, and risked a look between his hind legs. He was definitely fully male again, a twin to the magnificent champion Shepherd. A scent caught his attention. Captain was still on his back, making it obvious that change wasn't limited to Jacob.
Where the dog had once had a swollen pink shaft was now a small nub, and rows of teats were forming on his - her belly. The odor from the former male tugged at a new part of Jacob's brain, and he felt his own pink shaft sliding out of its new black-furred home.
The bitch that had been Captain rolled up suddenly, and sniffed at Jacob, then turned and presented herself to him. Jacob mounted her without thinking, realizing what he was doing only after his first thrust scored a direct hit. Then it was too late. He drove in deep and allowed intense instinct take over.