Dan shakes his head. He must be hallucinating. Maybe a shower will help. He walks down the hall, and into the shower room. He washes himself, and suddenly feels very hungry. He finds himself shimmying out the hight window and crawling along the brick ledge. A tall row of pines effectively screens his naked exploits from the campus. He keeps sniffing. soon he's looking upside down through the open window of the room below. It's Dave Tyler's room. He's still in bed, his golden retriever Max wakes up and stares at Dan. He inches between his sleeping master and Dan.
Dan swings through the window, pouncing on the dog. Deadly venomous fangs emerge from Dan's mouth and subdue Max. He whines. Dave calls from the bed as Dan rapidly cocoon the dog using his spinnerette's between his legs.
"Max, I'll take you for a walk in a minute, boy. Let me sleep a little longer," he says groggily without opening his eyes.
Max can feel the changes happening to him. His hair is being reabsorbed, his muscles shift. The venom in Dan's jaws is now programmed with the Mitch's dna--Dan's last meal. His partially emptied venom sacks refill as he feeds on Max's blood. Then he turns his attention to snoring Dave.
Soon Dave too is cocooned, and transforming mostly into Mitch, a bit of Max's DNA though has been added to the mix. So addition, to Mitch's build, Dave inherits some doggy traits too.
Dan slips out of the room, and cautiously climbs to the next floor, and back into the showers. Maybe he did get some climbing abilities he thinks as he drops down on to the tiled floor.