This not on the lawn, of course.
We first saw a warthog at Gorah in South Africa, eating the grass on the lawn at the camp. Tamara noticed it and was entranced, with thoughts of The Lion King and the sheer incongruence of a warthog and a lawn.
That patch of green was the greenest around because it hadn’t rained there for four years. Later, we saw this guy eating on the drought-blighted land.
Warthogs have calloused knees. Even in the womb, the foetus has callouses on its knees. So those knees are made for bending, and resting on the ground. And they really need to because their front legs are longer than the back legs. So even further to reach to the grass.