Join Date: Feb 2010
Location: Newcastle ( Northern England )
I have met horses in the past who have a problem with hay and dust, not that I am commenting on the quality of your hay, but my advice would be to start soaking your hay or at least dampen it before feeding, another idea would be to try your horse on haylege instead of hay. If in serious doubt Phone the vet.
We had a horse who suffered from COPD not sure if that name has changed but he was fit as a fiddle if kept turned out or had an open stable with rubbermatting and shavings and hay soaked or fed haylege. Good luck