What breeds of working dogs are there

1. The German Shepherd, also known as the German Black Bay, is agile and suitable for a variety of difficult working conditions. And in the Second World War, originally the German Shepherd was recruited by the German army to accompany them as a military dog. This breed is tall and powerful and has a very strong working ability, so it often appears as a search and rescue dog, military dog, police dog, guide dog and shepherd dog. 2. Labrador, a large breed of dog, is also a suitable for the role of guide dog and police dog, with a strong working ability, no aggression towards humans aggression, and a high IQ, ranked six in the world. 3, Golden Retriever is also one of the more common domestic dogs, working ability is also relatively strong, more patient, and easy to feed, but a lot of exercise.