Horses Offered Purina ® Hydration Hay ™ Blocks Demonstrated Improved Markers of Hydration Status During Transport A SUMMARY OF PURINA ANIMAL NUTRITION SPONSORED RESEARCH 1,2 CONDUCTED AT TEXAS A&M UNIVERSITY COMMERCE EXAMINING THE HYDRATION STATUS OF HORSES RECEIVING HYDRATION HAY™ BLOCKS VERSUS TYPICAL LONG-STEM HAY DURING SUMMER TRANSPORT.   INTRODUCTION The stress of transportation, especially during hot, humid weather conditions, can negatively impact horses’ health