The King Commands You
The Selvaggian Race could be called a dwindling race due to their numbers being very low. Since a lot of the beastkins are long lived, the challenge of procreation is also in effect like what other long lived races experience.
In fact, their low numbers are due to other species not getting along with each other as they do not proactively help each other. Even the royalty only act as mediators and not as official leaders because their race likes freedom above all else. This is also the reason for their demise as a race.
Unlike the Daemos that is hunted for centuries, the Selvaggians should have been able to expand their numbers. They are in a suitable environment, and they are safe but the nature of the beastkins that wanted freedom held this back.