Lystrosauruses are herbivores which means they are strict vegetable eaters. Eating whatever plants they could find in the jungles such as leafes, flowers etc. This means they are quite calm and passive animals. They dont attack humans without being threatened by us. But dont be fooled by its small size. Their jaws and tusks makes perfect weapons as they can attack you in a quick manner and hurt you pretty badly. They lived through the late Permian and early Triassic epochs around 250 million years ago.
They were found on Pangea, in the regions that is now called China, Mongolia, Antarctica, South Africa and India. So their species were very stretched out on the super continent of Pangea. Which made them the most common herbivore of its time. It is also said that the Lystrosaurus is concidered the first evidence of hibernation of some sort. They nested in burrows which could be why they would be safe enough from predators to hibernate.