So you have gnolls, but you don't have the gnoll's best friend. Honestly I just like the idea of partymembers being torn appart by these scavengers. Seriously, people love the gelatinous cube as a dungeon clearer, but I have a softspot for the humble hyena. Probably because I love gnoll, keep an eye out, the dwarf gnoll will probably make an appearance here soon.
Neutral Medium Beast
Str: 14 (+2) Dex: 15 (+2) Con: 15 (+2)
Int: 3 (-4) Wis: 13 (+1) Cha: 6 (-2)
Speed: 50 feet
Melee Attack: bite +4 melee (1d6+2)
Special Traits: trip (on a successful bit the hyena makes a strength check opposed by the targets strength or dexterity check, if the hyena succeeds the target is knocked prone), low-light vision, scent