There seems to be a cough working its way through my herd. One of the geldings got a cough that would not go away in September, the vet said it sounded like it was upper respiratory, and gave him antibiotics, making him better. None of my other horses got it.
BUT....a pony of one of my 4H kids did get it from coming out here and riding, well, that did get to my other horses. My 6 year old gelding got it, but kicked it on his own. The 20 year old pony and our 20 year old gelding got it, but could not get rid of it. After about two weeks, I had the vet out again. There were no upper respiratory sounds this time, but it was clear...it was an exercise induced cough (as soon as they began to trot. She gave them antibiotics...the gelding seems to be better, but the pony still has a slight cough (not nearly as bad). NOW...our colt has been coughing. Our 9 year old mare, and TB gelding do not seem to have been affected yet.
I will say, that they did not get their vaccines until mid-October this year...when this cough thing was already spreading about the herd. Also, I have been struggling with their nutrition, so this may have made their health more susceptible.