Cute Mob models resource pack.
https://www.curseforge.com/minecraft/texture-packs/cute-mob-models-resource-pack

deviantart - [AT-2]
https://www.deviantart.com/at-2

Yarr Cute Mob Models - Remake [yarrmateys]
https://www.curseforge.com/minecraft/mc-mods/yarr-cute-mob-models-remake