Not being a expert, just my uneducated guess... She was probably ate up with fleas when they got her and the itching and scratching made her loose her fur. Samantha had lost a lot of her fur by the time I finally got her and she looked pitiful, you could see the fleas running on her but her fur has come back beautiful since then.

From what they said about her, she must have been one sick girl and health issues will make them look bad too. Give her time and she will bloom like a flower and get beautiful... (I think she is beautiful like she is)