Let me just say that again: Thrush is not only a product of the horse's environment, poor nutrition is a deciding factor
I put my horses on California Trace in April and started seeing results in May, it was working and I was happy. BUT my horses didn't like it and I had to mask the flavor with anise seed powder to get them to eat it. Since it's also pretty expensive and only available over the internet I decided to look for some other options.
I went looking for something local, found DuMor Hoof (which I chose over Farrier's Formula after looking at the ingredients), and they ate that for about two months.
While I was in Oregon somebody recommended the Figuerola products to me so I decided to try out Equinesaver.
So after kicking myself for taking them off something that was working, last night I bought some more California Trace and should have it by the end of the week.
The moral of the story is that I've decided I'm tired of taking wild guesses about my horses' nutritional needs and have signed up for Dr. Eleanor Kellon's NRC Plus course. The class runs from November 7 through January 9 if anyone is interested in taking it with me.