Round Cows? In Space you say? You must be seeing things.
I do reccomend playing with Choose wild animals spawns: https://steamcommunity.com/sharedfiles/filedetails/?id=2564042934
as they dont spawn on the moon without editing the ocean biomes(yes thats what the moons use to prevent animal spawns). Check the image at the top to see my testing values you might wanna tone em down a tad. And every ocean biome is a different moon type from what i can tell so good luck.
