You know the team will soon be filling the locker room, so you stick Ricky Rodent into your backpack and zip it shut. Then you pickup Richard's clothing and shove it in his locker and lock it. Then you casually exit the Athletic Centre and head home.
You stroll by a pet store on the street between the Campus and the dorms where you live. You duck inside, and purchase a rat cage and hamster wheel, and some rodent pellets. The you stop to look at the snakes. It's tempting. You also decide to buy a leash with an adjustable collar, just in case you decide to adjust Richard's evolutionary state further. A mouse can be fun, but a dog could be more fun. But a mouse would be cheaper to feed, and clean up after.
When you get home, you set up the rat cage with hamster wheel and water dispenser and fill the food dispenser. Then you open your backpack. Where's Richard? You know you put him in there. Wait there's a hole in the pack. He gnawed through the bag.