There are many breeds of dogs, among which large dogs mainly include the following breeds:
1. German Shepherd: The German Shepherd is a working dog breed with high intelligence, agility, loyalty, and bravery. It is often used in the police, military, search and rescue, etc. They are tall and muscular, usually weighing between 25-40 kilograms.
2. Rottweiler: The Rottweiler is an intelligent, loyal, and brave dog breed that is often used for home care and security work. They are larger, usually weighing between 35-55 kg.
3. Alaskan Malamute: The Alaskan Malamute is an adventurous, friendly, and extremely endurance dog breed that is widely used in sled transportation and hunting. They are tall and usually weigh between 30-45 kg.
4. Saint Bernard: The Saint Bernard is a docile, friendly, and kind-hearted dog breed that is often used to find missing persons and play the role of guide dog. They are large, usually weighing between 70-90 kilograms.
5. Newfoundland: The Newfoundland is a large, gentle, and courageous dog breed that is often used for rescue and transportation work, as well as guarding homes. They are tall and usually weigh between 50-70 kg.
It should be noted that large dogs need enough space and exercise to maintain good health, and owners need to provide appropriate diet and exercise plans, as well as regular vaccinations and physical examinations.
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