Suppliments for coughing from dust?
I recently moved boarding locations and the arena footing is much better than where I came from, its a bit deeper and thicker, it has better grip which is so nice! I no long hear his hooves smacking on the arena base. But, they don't really water it and it can get dusty. On top of that, they use a leaf blower to clean the isle ways (which I hate). I take my horse for a walk outside when they blow the isle ways, but lately I have been noticing my gelding cough more in the dusty arena.
He kind of gets a grumble in his his chest, I can hear him working it out as we trot around, then he'll cough. He isn't labored in breating otherwise (Just the moments before getting the cough out) and he doesn't have any discharge or snot or anything. His nose is usually a little black from the dust.
Beyond wetting his hay and removing him from the barn when the isles are being blow, would he benefit from a suppliment like "Cough Free??"
Anyone know of a different/better suppliment? Have thoughts on this particular product? How about alternatives to suppliments. I am open to any advice.