Its like your own personal guard dog/molerat... Keep him in check by having other tames poop ontop of his burrow location, when he comes up for air yell, "doodoo head!" and enjoy the sweet misery that is a purlovia with a fat turd on its head. :)
These guys give a crap-ton of meat/hide when killed, depending on if you’re using a pick or hatchet. Also, not that difficult to spot when buried (on mobile at least), especially in the winter area. Just look for a brown bump that doesn’t match the surrounding area.