Pets

Rico says, though he loves them, his cats insist on obeying their primordial crepuscular (a word Rico hates having to know) hunting instincts and being fed at some ridiculous hour like 0300...
So, when they, in the inevitable way of animals, go to that Great Litterbox in the Sky, it's something quiet and that doesn't care when it's fed, like hamsters or goldfish...