Board Thread:Off Topic/@comment-26397825-20150713052232/@comment-26397825-20151028013107

Actually, while all Grimm can eat the bodies of their victims, they generally only do so in order to kill the victim. After the victim is dead, it is implied in the WoR: Grimm video that they stop, since the victim is dead and therefore they have accomplished their goal. Grimm don't actually need to eat.

So if the Sanguis Volpes are specified to always eat their victims, it is something unique to them as that goes beyond the Grimm's common goal of just killing the victim; it becomes both killing the victim and destroying the body.