I bought a gelding that lived in Missouri since he was a year old and he was 13 when I bought him, we moved him to our house about 20 miles down the road. In the spring he developed hives, we were in and out of the vet clinic often because they got so bad. This went on every May-September for about 2 1/2 years until I met a vet at a racetrack and he told me to try ACTH. Since giving the ACTH he has not had hives. I had to work with my local vets to get the ACTH, I ended up getting it from Wedgewood pharmacy.