Not all dogs found have been abandoned. I'd say for sure that most of them have been neglected in some way, or abused. Some do run away, or get out of a yard or leash, etc. Heck, Finn has even gotten out of our yard and I've only been fortunate enough to find him quickly the few times he has.

Regardless of the dog's past, her future certainly seems brighter. She looked so tired at the end of the video! Pretty little girl!