Ranarok ovis are more common in the high lands as they spawn in groups of at least 5, I've seen a group of 15 spawn at once but beware as gigas spawn in that area too
You should use Ovis for a mutton farm because mutton is like a less effective type of kibble. Most dinos Love mutton so this is a very useful way to use these!
If you wanna get wool without having to get ovis by just geting vegie cake make a cage with dino gate then get a argy to transport it into the cage then just simply shear it with scissors.