Hirogen have no qualms about hunting sapient species and in fact prefer intelligent prey as they provide a more entertaining hunt. Hirogen culture is centered around the 'hunt' - the pursuit of prey.
While the Federation was the first to make contact with them, the Romulans made contact later and some Hirogen have become their allies and part of the Romulan Star Empire however, it is impossible for all Hirogen to join the Empire because of the huge distance separating those in the Delta Quadrant from the Romulans, and because the Hirogen lack a single unifying government. Hirogen do not claim territory the same way the Federation or Cardassian Union mark their borders, but they do have a range extending across multiple quadrants. Because of their nomadic nature, it is unknown where the Hirogen homeworld is or if the Hirogen even know where it is. The Hirogen are a spacefaring race of humanoids native to the Delta Quadrant.