Hyenas have 8 needs: Hunger, Comfort, Bladder, Energy, Fun, Social, Hygiene, and Chew. They can learn behaviors and tricks just like dogs in The Sims 2: Pets and The Sims Pet Stories, but they cannot get jobs.
If a male and female hyena WooHoo, the female will get pregnant and give birth to hyena puppies after three days.
The hyena skin from The Sims Castaway Stories can be imported to The Sims 2 (if the Pets expansion is installed) or The Sims Pet Stories. Copy the hyena skin from the PetBreeds folder for The Sims Castaway Stories and paste it into the PetBreeds folder for The Sims 2 or The Sims Pet Stories. In all three games, the PetBreeds folder is located under the (My) Documents\EA Games\(name of game) folder.