Coughing a milky white phlegm.

[riding_high]

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.

 

[Shay]

Phlegm from the mouth not to nostrils? That doesn't sound like he was coughing so much as foaming on the bit? Was he coughing whilst you were riding? In general terms if is it milky / white then it isn't anything to worry about. Its green / yellow that shows a problem. It was wasn't actually coughing I would suggest checking for sharp points on his teeth - in case that caused him to foam up more than you are used to? If he was coughing then only you can really tell if it was a normal amount of cough for him or more. If it was more then you might need to adjust management etc.