Not sure if you wanted to focus on horse remedies or human ones, but here's my 2 cents...
I've been getting monthly acupuncture treatments from a doctor of traditional chinese medicine for the past several years, and I highly recommend it. (Re: my horses: If I could afford it, I'd have an acupuncturist come work on them, as well.)
I had been taking 3 asthma medications a day, plus an allergy med and advil for sinus pain, and it was just getting worse... The "regular" doctor wanted to put me on another inhaler. I was feeling really trapped, couldn't do much because breathing was such a chore. And if I caught a cold, I was out of commission for weeks...
At my first acupuncture session, I felt my sinuses drain and the pain go away. Wow! And my breathing was a little better, too. I had sessions once a week for a month, then every two weeks for a bit, then once a month. After 2 months I could stop taking my regular medications. After 6 months I realized I hadn't used my rescue inhaler in a while... After 3 years, I can walk 3 miles, or up and down stairs, without gasping or having my chest feel all tight. I haven't used asthma meds in 2 years at least. Allergy meds only when the pollen is bad, and then only a pill or two. Very few sinus headaches, and those are manageable. This doctor has even helped with my lower back pain and plantar fasciitis. I haven't been to a "regular" doctor in all this time, except for annual checkups.
If you do consider acupuncture, make sure it's a qualified (preferably Chinese-trained) professional. Not everyone who says they do acupuncture is really properly trained...
I had never considered acupuncture until a person I trusted told me about this Chinese doctor who had really helped with her rheumatoid arthritis. Now I am totally SOLD on acupuncture, and even though my insurance doesn't cover the treatments, it's way better than paying for all those prescriptions.
Sorry for the long post, but it's worked so well for me that I feel a need to spread the word...