The Sims Castaway Stories.
As such they have the same eight needs: Hunger, Comfort, Bladder, Energy, Fun, Social, Hygiene, and Chew. Also just like dogs they can learn behaviors and tricks, but they cannot get jobs.
It is possible to adopt a hyena in a similar manner to adopting stray pets in The Sims 2: Pets or The Sims Pet Stories.
If a male and female hyena WooHoo, the female will get pregnant and give birth to hyena cubs 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.