Coughing a milky white phlegm.
 

Horse coughed up a fair amount of milky white phlegm during exercise, nothing from nostrils (clean, clear and dry). He does have copd however this was the first time I've seen the phlegm, from mouth, milky white and amount. It was the similar consistency of beaten eggs so quite gross! Would you say this is something i should expect more of? Will speak to vet tomorrow as well.

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