Through one of the rescues that my lovely Fiance contacted, we found her original owner!!
Our homeless girl's real name is Fufi, and she's 5 years old. The original owner sent my fiance an e-mail this morning to confirm that the dog pictured was indeed her dog. This woman unknowingly inherited Fufi when she was 3 months old. Someone called and asked her to babysit the dog for a couple days, and never returned to pick up the dog, so she adopted the dog as one of her own, and treated her like gold. She was raised around a chihuahua, and was allowed to sleep in a nice warm human bed every night. (Quick anecdote: we introduced her to my brother's miniature daschund last night and she was pretty calm around him. I guess being raised with a chihuahua made her comfortable only around very small dogs, which explains her aggression toward any her size or larger). Her teeth were brushed daily, which explains her immaculate dental health and why the vet thought she was so young (guessing her age by her teeth).
Long story short, when Fufi was 2 years old, she attacked this lady's poodle, and nearly killed it. Deciding that Fufi wasn't a good candidate to be around other dogs, the woman adopted her out to what she thought was a responsible, loving home.
When we found Fufi she was seriously dirty, skinny, and had obviously recently whelped a litter of pups. My guess (as well as the vets) is that she has had at least 2 or 3 litters, if not more. It looks like the "responsible owners" who adopted her used her for pups, and left her out in the cold (literally, we found her during the big freeze here in FL), making zero attempt to find her.
The original owner was absolutely disgusted when we told her what condition the dog was in when we found her. Thankfully she has quite a list of contacts of dogless homes who would be willing to adopt, so, with her help and contacts, Fufi should be going to her forever home soon!!
I'm so excited, and, admittedly, a bit sad, that she'll be finding a home to love her. This is my first experience fostering a dog. It has been a bit disheartening, a touch frustrating, but overall incredibly rewarding. Foster/rescue dogs seem so appreciative of every little thing they are handed in life, and it makes you rethink the way that you live your own. Once some money things turn around, my fiance and I would both like to foster some animals in need again.