Here's a thought... Picard has a fish and Data has a cat. What pets would the other Ncc1701D crew (and others) have? Lwaxana Troi - Some small, yappy breed of dog that she would obnoxiously dote on. Deanna - A cat bigger than her mother's dog, who would terrorize it, causing Lwaxana to get upset at her daughter. Alexander - A ferret, mainly to annoy Worf. Worf - A targ. Maybe it would eat Alexander's ferret. Or maybe it would eat Alexander instead. Beverly Crusher - Golden Retriever. She just seems the type. Geordi - A floppy eared mutt with big soulful brown eyes. Just the thing to cheer you up after you get friendzoned for the 147th time. Guinan - Something colorful, exotic, and alien that requires sophisticated puppetry or CGI. Riker - A parakeet. I couldn't think of a suitable animal for him, so I went with something off the wall. Someone has to defy expectations.