I am so sorry Kay, I know that you are heartbroken, for sure! When I am thinking about the type of program I want to follow for my horses, I look to the big Thoroughbred farms who have horses worth millions of dollars. Believe me, they give Pneumobort (sp?). I always give it to the mare at the specified intervals.
My vet recommends it, and I really don't believe they recommend it just so they can get extra bucks from me. They get enough as it is, lol. But they have vaccinations they do NOT recommend giving, like Strangles. You have to pretty much insist on it, if you want it. I have never gone against my vet recommendation.