Install the mod https://www.kingmods.net/fr/fs25/mods/72130/ajuster-le-systeme-dalimentation-animale
 and place it in the mods folder.
Then launch Farming Simulator 25, activate the mod in your game, and once you are in your save, save and close the game.

Go to Documents > My Games > FarmingSimulator2025 > Savegame1 (or another savegame depending on where your save is). Inside this folder, you will find the default aaf file.
You just have to replace it with mine:
https://www.kingmods.net/fr/fs25/mods/73564/alimentation-realiste-pour-vos-elevages-danimaux