<< There are a couple of primary reasons why horses eat manure. One,
insufficient fiber content, which doesn't sound like the case with your
guys. However, do make sure they're getting at least 1% of their body
weight in hay or pasture to maintain gut motility. Sounds like they
are. Two, they're deficient in something in their diet, sometimes a
mineral. >>
Three, they've exercised to high body temps recently and have killed off gut
flora--solution, a pint of live yogurt.
ti