ycbm
Overwhelmed
The fizziness caused by alfalfa could be due to feeding it suddenly without introducing it to the diet very slowly.
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Mine was getting less than 100 grams a day of it in a feed mix. It sends him doolally. I should have kept the hat he reared up deliberately and punched a hole in as a souvenir.
He is also sensitive to similar amounts of linseed, and a bit less so to cereals. He's now on a grass product only diet.
It's definitely an alfalfa sensitivity issue, not a gut biome issue.
I get the impression it's possibly more common on appaloosas than in other breeds.
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