But have you considered the first one, the smell problem? Cat shit really stinks, which is a fatal blow in a narrow space. You can stand it, but your roommate can't.
What should I do if my cat's stomach is uncomfortable, becomes soft and stomps everywhere?
Cats have teeth (when they are four or five months old) and their teeth itch. It wants to chew something. What should I do if I chew the wire in your dormitory and break your roommate's charger?
What should I do if the cat is still parkour and catching all kinds of things to keep you awake at night?
There is no screen window in the dormitory, so someone should install it to prevent the cat from jumping away. There is no refrigerator in the dormitory, and the cans won't last long after they are opened.
If you say that you usually keep them in a cage and let them out when you go back, cats may not be so close to their relatives. Some cats will bark if you keep them in a cage if they have separation anxiety.
Therefore, it is really not that simple to keep a cat and a small animal without a fixed space.