The only one we've ever had with contracted tendons was given a calcium blocker in the form of an old school antibiotic and that allowed the muscles attached to the tendons to stop spasming and relax. I wonder if there's something to the calcium levels present in the feed at that time of year...maybe the levels are really high and they're getting overloaded with it? Just a thought. I remember reading that good Lucern Hay has calcium levels that are in excess of the requirements of most horses.
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