Just looking at her, she looks ALOT like my old bo's two Paso Finos. I don't want to stereotype Arabians as the only breed that flag their tails, but I'm thinking she may have some Arabian in there too, as she flags her tail pretty noticeably, but she's got the conformational look of the Paso's. She's got the same neck, same leg action same head. I do have to point out though that Morgans do actually gait too. I had an old Morgan (they said he was a morgan qh cross but I believe he was pure morgan), who occasionally, as it wasn't asked of him, would start to gait. He was an old barrel racer, so it was very sporadic, and not very smooth but he would try lol. So don't rule out the possibility of her being a morgan qh cross. I still think Paso or Paso cross though.