From publisher blurb:
The Grumpy Stomp is an omnivorous elephant-sized mutant featuring the DNA of horse, hogs, and humans. They wander the steppes and remote flatlands of the post-apocalyptic world in search of plants, carrion and at times – when their normal food is in short supply – other creatures, including people.
Domesticated specimens have been raised and trained, with both riding specimens available for purchase but also battle mounts which don't break and run at the first sound of a gunshot.
As a trained mount, these behemoths can carry a 'back-shack' which can shelter up to six adventurers for their journey into the wastelands and ruins of The Mutant Epoch world.
This six-page PDF includes stats on infants, younglings, adults and the rare, wild alphas, as well as a price list for those dig teams who want to purchase a Grumpy Stomp as a mount. Also included are a mutation list and plenty of art.