So I have wandered around the neighborhood with pictures of the cat now called "Zeha" and here is what I have found..
Zeha was a kitten born to an unwanted and abandoned litter, she was brought to the humane society, where she and her sister were adopted out to a family, the family is going through some trouble, and the wife and kids have moved to another state, leaving poor Zeha and her sister with a man who wasn't so animal friendly..so shortly after they left he put them outside to "fend" for themselves, as "outside" cats. Since Rhiannon(our previously found and cared for feral) left we have been trying to coax her back with food left out in the yard, which is undoubtly what brought Zeha to our deck that night. Her sister is still no where to be found, so our prayers are that she found someone to take her in.
After given full permission and ownership from Zeha's former owner, we took her to the vet, and she was given a clean bill of health, and as we are told, she is 4 months old. She is now adjusting to living here. Her and Tinkerbelle have their fights, but have been found sleeping together and playing together on multiple occasions, so I am pretty convinced they will be okay. She is still very frightened of my dogs, but she lets them approach her and sniff her, and hopefully will learn that not all dogs are bad. (any advice on that?)
We gave Zeha her name because "Zeh" (pronounced "zay-uh") means "Toe" in German, and Zeha is what is now called a "mitten" cat or a polydactyl and has 14 toes on her front paws, and 10 on her back paws.