Why do animals who live underground appear always clean and not full of dirt? (e.g. worms, mice, rabbit)

Question

Why do animals who live underground appear always clean and not full of dirt? (e.g. worms, mice, rabbit)

In: 7599

Answer 1

Rodents & Rabbits tend to clean themselves constantly unless they’re sick (they can be cleaner than some humans)

As for worms, they’re covered in a type of mucus; It’s a lubricant that lets dirt slip off of them.

Other animals are just built really smooth, so dirt has little to actually stick to.