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We learned this: If, for instance, you have minerals available to them, and they’re eating minerals to their needs, and then you infuse those same minerals into them, they form an aversion. They don’t want to eat the straw anymore. Why? Because it’s too much. It’s in excess of what they need.
When we first started doing those studies, and we would offer cheap—for instance, a really poor quality food, like straw. And then, after they ate that, we would infuse nutrients directly into the bloodstream or put them directly into the rumen. And then we’d see that it totally changed liking for this not so good food as a function of doing that, and it just stops you in your tracks because it becomes real. It’s not… It’s you’re watching that happen. The next day, the group that got infused with a nutrient that they needed is really showing a great liking for this straw. The group that got water isn’t showing any liking at all—I’m trying to make it come alive. But, when we first started doing those studies, it took me a long time to fully understood what I saw, to really fathom that you can put something in their gut and it totally changes their liking and how much of that food they eat.