Tom's mind was blank and then clear as day, he thought of the rat he had growing up who he never really had a proper cage for. Because of that, she got out a lot but was good enough to come back. Always pregnant, though.
There was a sharp pain in his gut that resulted in Tom hunching over and grabbing his own belly. The action caused a shudder of pain down his spine that resulted in an actual wiggle of life at the end. Tom's eyes shot open and staring to the tip of his nose he felt it twitch and start to shrink, small hairs growing from his cheeks.
Tom's eyes dilated and when he went to say something, a crackle of nothing ineligible, then a rodent's squeak if there ever was one.
"Oh, gross," Kate dismissed once she saw his snout starting to push out into a more and more pronounced rat nose with the ears and budding tail to match.
"Pl-pleeeEAK!" Tom attempted to beg, his elongating fingers reaching out for Kate. He stepped to her but his height and overall frame diminishing caused him to stumble forward onto his hands and unknowingly at the time, his final position. "This... can't be me... I... not like this..." Tom struggled to saw, the rooming growing around him while his hair rained down already him as fur took its place.
"Of all the animals you can think of, in the world," Kate said, shaking her head, watching Tom's glasses tumble off his more rodent than human face, "you pick a rat?"
There was a series of pops and cracks as Tom was secured onto all fours, his hips readjusting and splitting his ass. Matt couldn't help but stare with a growing tail over a puckered asshole and was was swollen looking bestial sex, absorbing the rest of Tom's shriveled cock.
"And not even male..." she tisked, noticing like Matt had; that Tom's gender had flipped. The rows of forming teats were evidence enough.
"Oh... no..." Tom desperately said in a low, feminine voice, his shirt now feeling more like a heavy net.
"Oh no!" Matt cried out, like Tom but still loud enough for it to cut through everything. Kate looked up and saw Matt tipping over, a ropy rat's tail growing out behind him.
"Oh, you saw your friend and just had to join?" she huffed, hands at her hips.
Matt, undid his belt as he walked, his ears changing quickly, along with his whiskers and snout. "He was right there," he snickered, "I couldn't help it, I," and he tugged down his pants, his cock half-way between red and human, sheathed and ready for a mate. Even as the rest of him shrunk, Matt's balls pulsed with more growth.
"Sigh, well I'm not taking you two to the farm," Kate said as Matt crawled towards Tom, shrinking with every step until he was on all fours and dragging his new tail along. Tom could smell Matt, and more, and was now just patches of fur. For Tom's mind, most of what was human was cursing his memories of his old rat. Other feelings had the heat at his backside that was foreign to him but very much a part of him leading his thoughts.
To that end, Tom scurried out of his shirt, briefly scaring Kate before turning and heading towards the now dog sized rat boy that was Matt. Brushing under his tail and furry balls, Tom felt control of him sapped and left to a submissive creature that now had its ass up and tail to the side. Shutting his beady black eyes, part of Tom still couldn't believe this was real.
With a thrust, Matt's red rodent cock shattered any illusion of humanity, and by the end of the encounter, both were squeaking away.
"Not the barn," Kate reiterated. "Throwing you two out back near the dumpster like you belong."
And after shooing the two into a box, she did just that. Despite searches, the two boys were never found. Rats infested the college for years to come, though.