Update - She's home with us!!!
The pound vet estimates her as 6-8 yrs old.
They removed 5 of her teeth. And when they got inside to spay her found that she had a severe uterus infection which would have killed her without medical attention.
The lady doing the adoption paperwork mentioned that she may have been used for breeding.
She's so delicate and absolutely delightful. Her personality is awesome! She's a lover! Snuggles right up!
She followed us around everytime we got up the first couple of hours she was here. And slowly stopped. It's like she realizes we're good, and when we get up, we come back. That we're not leaving her.