Please help me flesh this out: You share a "long haul" freighter with six-ten other people. Everybody can have one pet that runs lose (cats, ferrets, etc.) or more that are permanently confined to the person's private living space. (Gold fish would be an example of the latter.) Tribbles are not allowed. So what would you take aboard and how do you think they'd get into trouble while on the freighter. The ship is on a circular route, traveling around a six-planet course. Some planets don't allow "alien" species off the ship, some require them to be placed in quarantine or "stasis" while in-system. Earth pets are fine, but if you chose one from another system please give fullest details appropriate regarding the critter.