I'm glad you don't have fesue. I didn't really think you did, since Misty was fine. I'm not sure if fescue affects all mares or just some.
There's really not much else for you to do then what you're doing. But if she does the lay down thing and groaning and nothing happens I'd call the vet.
Becky
It's an odd phenomenon.... It could be that not all mares will abort, certainly there are many wild and common types of fescues that have always been part of a horse's diet... Perhaps it is particular mares who are more susceptible than others, perhaps it is a matter of how ~much~.
No, we don't have fescue. From what I understand, the fescue itself isn't the problem, it's a fungus that normally grows in the fescue that causes the problems. There is a new type of fescue that does not harbor the fungus, and is supposed to be safe for mares, but why chance it. I'm planning to plant my pastures in bermuda grass this spring.