German Shepherds are known for their loyalty and protective instincts, but they also have a high level of intelligence.
Golden Retrievers are not only friendly and affectionate, but they are also quick learners and excel in obedience training.
Doberman Pinschers are highly trainable and have a strong work ethic, making them great for tasks such as search and rescue.
Shetland Sheepdogs are known for their intelligence and problem-solving skills, as well as their ability to herd livestock.