Pastoral Peace is a journeyman-level Alteration spell that uses a modified version of the Wabbajack script to turn (almost) any creature into a tame sheep. Unlike Wabbajack, this change is permanent. The sheep will still be carrying the target's inventory, if any.

The spell can be bought from Raminus Polus in the Arcane University, as well as a few others around Cyrodiil.

Compatibility:
Should be compatible with almost anything. Uses an invisible quest to give the spell to spell merchants, to prevent conflicts.

Warnings and notes:
The script uses PlaceAtMe, which can cause savegame bloating. The sheep won't always appear in the exact spot the target was in; this is an inherent limitation of PlaceAtMe that I don't know how to solve.
Should theoretically change male creatures into rams, but it seems most creatures don't actually have a gender.
Don't use it on quest-related creatures like the unicorn; the game doesn't consider the sheep the same creature, so sheepifying them can make the quest unfinishable.

This is my first mod here, constructive criticism is very welcome.

UPDATES
1.1Edited the script a bit to hopefully make the "sheep doesn't appear in the same spot the creature was in" problem show up less often.
1.2Added the spell to more merchants; now most Alteration-oriented spell merchants have it.