Do you ever notice cooking odors or the smell of cigarette (or other) smoke from other apartments in the hallways of your building or in your own apartment? If so, you're probably asking for trouble with that particular odor-producing activity you're thinking about starting.

By the way, are all your animals enumerated on your lease or otherwise known to your landlord? If not, once someone comes into your apartment investigating those rodent odors....OOPS!