I think this is a really good looking Mustang. I do not know where exactly she came from but the Geiger Mustangs have this look...I think!
If I am wrong them I am sorry for that. I imagine you would be able to find this out when you get her papers.
Geigers that I have seen seem to have very short back and very refined head as this gal does. She is a nice looking little mustang and your going to have soooo much fun.
Hope you will find out more about her heritage.
There are many mustangs where I live, and....unfortunately with the ever falling economy there has been problems within the last 4 or so years with people letting there domestic horses out onto the range. Tragic it is. They think they are doing them a favor when ...in reality they are not!
I think she is very well built. If you were planning to do jumping, an x-ray will show you if her knees are good....I am not a fan of pushing youngsters myself but you can get a vet opinion on that stuff.
Do you know if she was even on the range? She may have been foaled in captivity.
So happy for you two!
Best wishes and if you ever find out where she is from I would love to know!