Polysaccharide Storage Myopathy (PSSM) is a condition in horses where there is abnormal glycogen storage occurring in muscles resulting in the accumulation of excessive amounts of glycogen and an unusable polysaccharide. The accumulation of these compounds can result in symptoms that might range from reluctance to “move out," in its mildest form, to an acute episode of “tying up” or rhabdomyolysis. Another term for this condition is “Equine Polysaccharide Storage Myopathy” or “EPSM.."
A horse im considering has this.. the owner says...
"Unique and Noble have both tested positive for PSSM. Both are totally non-symptomatic. PSSM is a very old thing (tying up) but there is now a test for it, developed a couple years ago. It is not life threatening at all but it is nice to know, just incase. The stats show that 33% of all QH have it so all other stock horse will be the same. They are on special diets (high fat), preventative measures. We have been totally honest since finding out that Predestined is n/P1...contacted all P foal owners to give them the option to test or not test."
Should I be concerned? She says the filly is non-symptomatic, however is it worth my risk to spend the $10,000 on this filly?
Here's a picture of the little gal. She is thought to be a a chimera, formed from two embryos blending to form a single individual (also why the rare brindle color occcurs). She could have started as a pair of twins, one solid, one spotted, now blended into one horse. So she is very rare!