Yes Merlot, I know all about it and defiantly know what it does to Freya. However, as I am a good 10 hour drive + 3 hour boat trip away from home, I have no say over what my horses are put out to. That is the pasture available, the horses have space to move and run around like idiots, I don't have to pay anything for it and they are also on toxin binders and salt lick to try and counter act the bad stuff.
As I said, it's a dairy farm. They're more concerned about the cows than a couple of horses ;)