If you want hens to eat oats, why shouldn't they? Or does grass work 100% of the time for cows?
You have control over TMR compositions, crop assignments, mixed feed formulas, and food effectiveness with this mod.
Qualities:
Adjust food group effectiveness (productionWeight) and consumption preferences (eatWeight) for every animal species as part of animal food control.
Particular Crop Assignments: Crops from any food category may be added or removed (for example, oats can be added to chicken feed and cows can be fed alfalfa silage).
Customize mixed feeds, such as pig feed, by varying the crop kinds and constituent amounts.
Recipe Control: Tailor recipes to include exact minimum and maximum percentages for every component.
Schema-Verified Configuration: For reliable, error-checked XML processing, use the game's integrated AnimalFoodSystem schema.
Intelligent Merging: Your XML automatically adds new content from modifications or game updates while overriding customizations.
According to Savegame Configuration: An XML file is sent to each savegame for personalization.
Updates that happen automatically: Every load immediately updates the configuration file with any new material.
Please take note that this mod is in beta. Before using your savegames, please make a backup.
Editing an XML file created in your savegame folder allows you to make changes. There is no in-game user interface.
Adapt elements of animal nutrition without changing map files:
Food efficacy (eating weight, production weight)
Which crops (fillTypes) are included in each food group?
Recipes for mixed feed and the ratios of ingredients
Compositions and ranges of TMR/forage recipes
Use:
Upon first start, the configuration file (aaf_AnimalFood.xml) is automatically generated in your savegame folder.
Find the XML file in your savegame location once you've finished the game.
To make your animal feeding system unique, edit the XML.
As long as the XML file is available and the mod is running, the changes are applied to each savegame load.

Thanks to rittermod