this was the old list but I don't see horse, so it needs to be updated.
Blaze 0.1%
* Bunny 1%
CaveSpider 0.1%
Chicken 1%
Cow 1%
Creeper 1%
* Elder Guardian 1%
Enderman 0.1%
* Endermite 1%
* Evoker 1%
* Guardian 1%
Ghast 1%
Golem 0.1%
* Illager 1%
LavaSlime 0.1%
MushroomCow 1%
Ocelot 1%
Pig 1%
PigZombie 0.1%
Sheep 1%
* Shulker 1%
Skeleton 0.1%
Slime 0.1%
* Snowman 1%
Spider 0.1%
Squid 1%
Villager 1%
* Vex 1%
* Witch 1%
* wolf 1%
Zombie 0.1%