I had a heavy stock type mare I was riding CTR that was tying up during
conditioning. I finally correlated the episodes to her being given alfalfa. I
tried to put her on alfalfa 3 different times and 3 times she tied up shortly
after riding out. So I cut it out completely. I also started her on a Vit E
Selenium supplement ( after carefully reading all the warnings ). I did 1250 CTR
miles and countless conditioning and pleasure miles and she never tied up again.
I am convinced it was the alfalfa, but I dont think the Vit E Sel hurt at
all either.