I am using BTB Wind on my 34+ year old horse Georgie. He was on Ventipulmin Syrup but with it on backorder we were struggling to find something to help with his heaves, COPD and allergies to almost everything but mostly dust. This year has been so dry in Montana we struggled to find him any relief. I have truly tried almost everything available over the counter. Nothing helped and even with doctoring some of it with lots of molasses, I couldn’t get him to eat it. I found your site googling options for my Georgie when my vet and I ran out of ideas. We had to put Georgie on steroids which seemed to be the only thing to help him but even they don’t work great. Of course, prednisolone went on back order too so he’s on prednisone. (Ventipulmin really was the only thing to 100% clear him up.) BTB Wind has helped him a lot! We really noticed a big difference when we ran out of it for a few days. When I reordered the BTB Wind, your site also recommended Immuzim. I have only had him on both for 2 weeks now but I think he is eating better. He struggles to gain weight and hold weight like most respiratory horses. The only noticeable wheezing we hear from Georgie is when he comes running into our corral!