In the not too distant future I hope it will be possible to add the requirement to feed the horses. This could be cut grass, later maybe hay if we have a way to dry it, Maybe it lays in the field then we have to pick it up after it's dry. But also corn and wheat. I am growing an enormous field of wheat and corn in anticipation! So corn too would need to be dried (in the real world anyway). After horses, then once we get the way to tame/capture other animals it could be a requirement to feed them corn, wheat, or hay. Domesticated animals could have a health indicator that would show if we click on them or something. If they don't get fed or have access to food they will die.
In addition to animal feed, we should be able to add the ability to grind corn for corn flour/meal. This could be used to make cornbread and other food items. Seems like that maybe the easier thing to do sooner. Then our player character requirements for food should be more food more often than it is now, or a slider to increase it in settings. (I don't usually play survival, but once you have a garden it's moot, and because I don't like combat I usually just play for the building. I expect you are thinking down the road about crop failures! Which would certainly up the difficulty.)
Related to the corn and wheat: Bigger stacks of corn in inventory, please? Especially if it becomes animal feed. 16 is just too little. Wheat makes big stacks. Corn should be higher but maybe not as high as wheat. I've only managed to get 635 wheat in total, and in a single stack. If it's like stone, 999 to a stack, that's 27,972 wheat in a barrel! But I can only get 448 corn in a barrel. (999 stones in a stack is crazy, but I understand why.)
Ready to make feed!