I've read several articles about those lately after talking to a friend in Europe that feeds them. I've seen them here in thd health food store for human consumption. $$$$$ if you fed to your horse.
He's updated his article...
He's updated his article...

Protein for horses revisited
I need to update my view on protein sources to account for the deception many protein supplement manufacturers are creating at the expense of helping our horses. Deception is a strong word but applies to…
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