German Shepherd Dogs were developed in Germany around 1900 by cavalry officer Max von Stephanitz, who wanted a capable, intelligent working herder. The result is a strong, agile dog, longer than it is tall, with erect ears, a bushy tail and a dense double coat, usually black and tan, black and red, sable or solid black. Adults commonly weigh 50 to 90 pounds.
Many Shepherds are loyal, quick to learn and watchful, which is why they work in police, search and assistance roles. They often stay reserved with strangers, and some become overprotective without thoughtful socialization. In Frisco, where homes sit close together in subdivisions, that watchfulness can show up as barking at passersby. A calm adult with steady training can be an excellent match, and dogs vary widely.