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 [RC] tight rear muscles and hindend lameness - shermanTitle: MessageAre you 
supplementing with selenium? Or have you had his selenium level checked to rule 
that out as an issue? The range of normal for a horse is .05-.50 (very wide 
range) but endurance horses usually need a level of .25-.3 to keep from getting 
muscle soreness.  Storm used to have hind end lameness at about 35 miles 
into a ride, sometimes sooner, eventually he started getting sore on 15 mile 
conditioning rides. His selenium level was at .092 when I finally had it 
checked, well within the range of normal for a horse doing normal work, but 
not high enough for an endurance horse.  He's never had a problem 
since we started supplementing.  
Kathy 
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