I found my boy got worse in hot weather. He would get respipulmin or ventipulmin whatever bronchodilator, and alphalpha pellets with soaked hay. Vet advised pellets as they were guaranteed analysis where hay cannot be. Good luck!
Yes! My horse has a pump like a human that we gave before work and when she started coughing. We also kept her out.
My horse has copd I keep him outside as much as I can, feed him haylage instead of hay and bed him with shavings instead of straw