Anyone missing a dog - East Brainerd

Sweet bridle pitty has been wandering my neighborhood since last Sunday or Monday. She is wearing a lilac collar without tags. Took her to the vet and they couldn't locate a microchip. She has been spayed. Very gentle and friendly. Will get into the car no problem and tries to come into our home. Contacted McKamey but they can't take her in for 2 weeks. None of our neighbors have lost a dog and noone has any idea where she came from. Anyone recognize her or have suggestions on a rescue who might take her in?