This mod makes most animals in the game slightly fatter, this required optifine or any other mod that mimics optifines CEM feature, like custom entity models or entity model features entity model features also requires entity texture features
Join the Discord! where this mod was even requested! You can ask for help, a mod, just suggest something, hangout or request the source code of any mod I have made (if I still have the source code)
Or donate to my Kofi incase you are feeling generous!