Contact your local animal shelters and report that you found her, also contact all the local vets in your area and let them know you've found her. Next take her to the vet and have her scanned for a micro chip, and place found ads in your local news papers. Also put up found flyers, I'd do so in the area you found her, surrounding neighborhoods, and in local coffee shops and vets offices that will let you post such things on their bulletin boards. Keep her for at least 2 weeks so that if she does have an owner they have a chance to find her. After that you can try and rehome her. In the 2 weeks you are waiting you can also be trying to find either a rescue to take her or an adopter for her, let whomever might be interested know that she will be available for adoption in 2 weeks because you are not positive she was dumped and want to let any owners a chance to find her.
Thank you for rescuing her and for caring so much about seeing that she is safe.
Thank you for rescuing her and for caring so much about seeing that she is safe.