Hi everyone,
I’m curious to hear from folks who’ve used MSM for horses with heaves/RAO. Pony has been struggling a bit this summer: super humid weather, smoke from Canadian wildfires, and now we’re in full ragweed season… So we’ve been a little extra “heavey.” 
I’ve read the previous threads on MSM and heaves, but my question is more about the timeline: how soon did you start noticing any improvement in breathing, comfort, or exercise tolerance when you started supplementing?
Thanks!
