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.
I don't know if my horses are especially hard keepers or what, but all the frog growth they'd gained while eating California Trace was lost while they ate the DuMor- and that was with me spraying on oxine and dusting with No Thrush nearly every day. Basically the topical treatments just kept the thrush from eating the live frogs, it didn't helped the callused frog grow out at all. The only good thing about it was that the Quarters liked the taste. Basically it was a giant waste of money, time to move on.
While I was in Oregon somebody recommended the Figuerola products to me so I decided to try out Equinesaver.
They've had this for the past month, while their winter coats have started growing in nicely and they love the taste, I haven't seen any sign that their frogs are improving (still treating with topicals, mind you). Knowing that copper and zinc are super important for coat and hoof growth I took a closer look at the ingredients on the bucket. Holy crud! The amounts of copper and zinc in Equinesaver are miniscule at best, no wonder their feet haven't been improving!
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.