Does Hunter's Howl Have an Effect for Hunters?

Here's the spell in question.

If a Hunter casts it (the Ranger/Druid hybrid), what happens?

Same thing it does for anyone else?

it give you the bonus of favoured enemies listed in the spell against those that failed their save against this spell, it never say you must have the favoured enemies to benefit from this spell

Yes. It gives the +2 bonus listed.

If you have no favoured enemies, none of the subjects are shaken, but you get the +2 bonuses listed, just as if you were a ranger with a different favoured enemy.

Thanks everyone.