My first dog was an adopted stray

A border collie-ish type dog I rescued off the street, quite literally - saw her on the street and lured her into my backyard before the dogcatcher could see her. Evidently she had been abused, because she cringed when you went to pet her, but she got over that with lots of love . Only dog I've ever seen who could play a legitimate game of tag, that is, you chase her till you could tag her tail, and then she'd chase you until she could catch your pant leg, and then she'd turn and run till she was tagged again, and on till we were both exhausted