I am just trying to get some ideas before the vet comes out to look at her. This started 2-3 days ago. Deanna said the only rain they have had was yesterday. It's not scabby or itchy. She did have to pick up the loose minerals, the broodmares out there kept knocking them over. However, she does have mineral blocks out there for Queen to get to. I know some horses don't like them as much. She is on grass, grass hay, and a bit of grain (Purina? I can't remember at the moment). She was wormed about 3 weeks ago. Does anyone have any ideas on what could be causing this? Excuse the mud, she likes to lay in it at the edge of the pond.
ETA: The only history I know is she had no hair when she came off the track. The woman who I purchased her from put her on a supplement called Super 14, and the hair grew back in.