Goats' refusal of young blackbrush shoots, furthermore, is outright. They want nothing to do with it. Provenza pointed at his hand, then his arm and body, and said, "Every organ and every cell has receptors similar to what's in your nose and on your tongue." Creatures communicate within their environment the same way they communicate within their own bodies -- through chemical trigger substances that bind to receptors and produce responses. "It's all part of a feedback system," Provenza said, "that tells the body what's good and what isn't."

Goats are not stupid after all. They don't bumble through the world eating what they were born to like. They experience need states, satisfaction, and delight along with aversions to strong a mere hint of something can make them turn away in disgust. Flavor is what nutrition feels like to a goat.

If goats had a word for delicious, it would have two meanings. The first would be: I like this. The second would be: This is what my body needs. For goats, they are the same thing.

Mark Schatzker