Hi, 
I was able to get the Ann Arbor TSC to stock it regularly. It was a slow start. I talked to my vet and other vets as i could and gave them brochures. That was able to get at least a few more people on board to buy it. But it does take persistence.  At first, it was slow going. And i bought 5-6 bags at a time as i wanted to make sure to have it on hand and not run out. Now i dont worry as there is plenty at our local store. (At least so far). Hope this helps. Hang in there and others may not know how you helped their horses by making it available, but you have. 
All the best, 
Mary Marzec
Chelsea, MI, 2013

https://ecir.groups.io/g/CaseHistory/files/Mary%20and%20Katie