Next time you are in the barn take a few minutes to look at your hay.  Are you familiar with the quality of it or guessing it?  What about the nutrient content?  "Forage Is First" rule applies to all horses - their digestive systems work the best when ample forage is supplied.  But not all forages are created equal.  Was it a good year or a stressful year for hay production?  So, you ask, what…