Is asparagus safe for horses to eat?

There is no record on asparagus. but according to chronofhorse.com, The unsafe food for horses are Avocado, Onions, Potatoes, Persimmons, Rhubarb, Tomato..More?
Updated on Monday, February 06 2012 at 10:18AM EST
Collections: persimmonsrhubarbasparagusavocadoonions 

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