When Your Horse is at His Best, You Are too. 
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Lessons from the Farm

What we’ve learned can help you care for your horses and return the happiness they bring you.

Information from Our Horse Experts

Animal experts at the Purina Animal Nutrition Center share their knowledge about horses.

What causes polysaccharide storage myopathy (PSSM) and horse tying up?
Type 1 PSSM is caused by a genetic mutation. Insufficient exercise, and a diet too high in starch and sugar and too low in dietary fat can contribute to the onset of type 2 PSSM. Currently, horses with both elevated glycogen and the abnormal polysaccharide are identified as type 1 PSSM, whereas horses with elevated glycogen stores but no abnormal polysaccharide are identified as type 2 PSSM.

Video Lessons from the Farm

Learn more horse feeding and caring tips from our Purina Nutrition Experts.

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