Dr David Marlin and Dr Kirstie Pickles tell us more.
Team USA Showjumper and 4 time Olympian Beezie Madden talks to Horse Network about three life changing moments.
"Her life is changed," Whendy reports of Sunni. "There's no more coughing, she can breathe." For fellow owners of horses with these respiratory diseases, she urges: "Eventually, if you love your horses, you are going to have to steam their hay. Things won't get better without it."
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