Nutrition is an expensive but indispensable resource in animal farming, and using the right levels of all vitamins is one of the ways to ensure productivity and prevent wastage.
In the old days, it was believed that dairy cows that grazed all day for fresh forage required no further nutrients. That was true: The bugs in the rumen would produce enough nutrients, including vitamins, to sustain their host. Again, back then, this was correct based on the level of...
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