Festrog

Spawned from corpses of those who died of illness or starvation and twisted by negative energy, festrogs display a viciousness that rivals other undead. They resemble decaying humanoids, but with elongated arms, teeth, and bone-like spikes protruding from their upper backs. Festrogs' tendency to run on all fours has led to them gaining the moniker dog-ghouls, causing the unwary to mistake them for mindless predators. - Pathfinder Bestiary 3
Artist: Mike Szabados