Mooshroom Spawn is a minimalistic configurable mod which adds a chance (default 1/20) for mooshrooms to spawn naturally in place of a cow spawn. In the vanilla game they only spawn in a mushroom biome.
All available config options:
chanceCowIsMooshroom default 0.05, min 0, max 1.0
The chance a cow that has spawned is of the mooshroom variant.
You may freely use this mod in any modpack, as long as the download remains hosted within the CurseForge or Modrinth ecosystem.
Serilum.com contains an overview and more information on all mods available.
Comments are disabled as I'm unable to keep track of them across so many separate mod pages.
For issues, ideas, suggestions or anything else there is the Github repo. Thanks!