Shepherd isn't a single breed. It's a label for dogs with herding or flock-guarding ancestry, and on adoption listings it most often means a German Shepherd or a German Shepherd mix. It can also cover Australian, Belgian, Dutch and English Shepherds, plus crosses with Labs, Huskies and other dogs. Their ancestors gathered, moved and protected livestock, which is why many are alert and quick to learn.
Most are medium to large, roughly 45 to 90 pounds, with a thick coat that sheds. Many are loyal and watchful, and some are reserved with strangers. In Tyler, that watchfulness can show up on busy walks and at the front door, so training and calm introductions matter. Size, energy and coat vary a lot from dog to dog, so the dog in front of you tells you more than the label does.