What specialized forelimb adaptation facilitates the warthog's primary feeding behavior?

Specialized, thick pads on their wrists that allow them to kneel comfortably

The warthog exhibits a significant modification in its forelimbs directly related to its specialized diet. They have developed distinctive, thick pads situated on their wrists. These pads serve a crucial biomechanical purpose, enabling the animal to kneel down while foraging. This kneeling posture is essential because it facilitates the close cropping of grasses, which constitute the animal's primary food source. The high degree of modification observed in the wrist bones strongly suggests that evolutionary pressures heavily favored persistent, low-level grazing, effectively cementing the warthog into a specific dietary niche that required this specialized anatomical adaptation.