All Todays description on sheep
Fossils of these herbivorous mammals were found all over the world, except Antarctica. They came in many different shapes and sizes, living in almost every kind of climates and habitats where they thrived in. Their incisors suggested that they most likely had beaks much like birds and many turtles of today. They are likely cold-blooded, so they were possibly sluggish and need to warm up their bodies through heat from sunlight or other forms of heat producers. They likely had sprawling limbs like crocodilians of today, in which are one of the mammal's closest living relatives, other than birds. Goats, however, were different from other sheep species, as they had sockets in their limbs, suggesting that they had legs underneath their bodies unlike most other sheep, so they run more efficiently. They most likely laid hard-shelled eggs like today's birds and reptiles as eggs have been found near fossils of sheep. Their average lifespan is currently unknown, but they could have lived for at least 750 years or more since they're cold-blood like modern reptiles. It is unknown on why all known species of sheep became extinct.
Introduction to real life North America
Since real life humans had introduced all todays sheep to real life North America, these sheep now coexist alongside real sheep and goat species, including domestic sheep, domestic goats, ibexes, mountain goats, and others. They are peaceful and gentle animals, but unlike their ancestors, however, they are no longer timid as they adapted into human settlements and learned to tolerate human activities and among others, so they now flourish alongside real sheep and goat species and are now very tame towards any sapient species.