Make animals capable of eating dropped food

I want passive animals (and tamed ones) to be able to eat dropped food they normally eat, by such, all animals that can enter in love mode or juveniles that grow after eating, they'll do. However, if they don't want food (ej love mode cooldown), they won't eat it.

Why I want this? I see as absurd like a cow doesn't eat dropped wheat in front of him, and any other example with most passive animals, but the big thing would be that it would allow for so many creative possibilities for the community, and revolutionize niches like cattle raising.