I had bunnies when I was a little girl. Other than the fact that they poop an absurd amount, and ours liked to hide behind the fridge, they are pretty nice.
Denny spends a lot of time coming up with gifts. He knows I can’t stand cats, I don’t want big dogs, and little dogs cost an insane amount. Reptiles are nasty, and most rodents are too. Fish are boring, and so on.
That left him with a hampster, or bunny.
So he went looking for bunnies.
Thus, Piloff became a member of the family.