Updated Mobs is a pack that aims to revamp many old minecraft mobs models and textures to better suit minecrafts modern mobs! 40+ new models and 60+ New textures!

Works best for Versions 1.19-1.21
OptiFine OR mods: EMF / ETF Required

Tutorial:

Due to OptiFine having inconsistent updates and features, its recommended to use mods: EMF & ETF instead

If using OptiFine, make sure to enable these settings for complete features:
Video Settings -> Quality -> Custom Entity Models: ON
Random Entities -> ON
Emissive Textures -> ON

In order to prevent texture issues, This Pack should be at the TOP of your Resource Pack list.