What is the condition referred to in the Black Beauty movie (the one with Sean Bean), after Ginger's race, when she's coughing and her sides (around the ribs) are white , and the one man says "You've broken her-- she can't breathe properly"? I have seen horses with white sides like that, and I'd like to know what causes that and where I can learn more about it. Is it COPD? If so, why can I find nothing about white sides being a symptom of COPD?
Thanks very much for your time.
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