This is interesting. My friend's mare started acting studly this fall. No mounting (yet) but like Fugly's, at the fence. She mentioned that it could be hormonal and wanted to have the vet out to check for a tumor like Peds mentioned. But yeah, the old girl puts on quite the show. I'd never heard of it before, but then again, I've only had geldings.

Like the Old Man said:
Life's tough; it's even tougher when you're stupid.
We miss you PD!