Aww your girl is ADORABLE! She reminds me a lot of my girl Moka. Her back is black hair and very brittle and breaks off easily, but her tan hair is soft and silky and grows long. Your girl may be what is often referred to as a a red leg. You can research it here as there are several threads about it. Perfectly healthy, just a type of hair/color. One thing about my Moka is, she's the easiest to groom because she NEVER mats. I do have to watch her skin a little because it tends to be dry. Regular baths helps keep her skin and hair soft though.
__________________ Shelly and the girls  Moka Mylee |