page_title: Working animal
section_title: Pack animals
hierarchical_section_title: Working animal / Roles and specializations / Transportation / Pack animals
caption_attribution_description: Lloyd the llama rests near the Chasm Lake Junction on the Longs Peak Keyhole trail in Rocky Mountain National Park, Colorado. Lloyd is one of the llamas used at Rocky Mountain National Park to clean, maintain, and supply the high country privies. Lloyd is waiting near "Sky Potty Junction" at an elevation of about 11,700 feet above sea level. Another privy at the Boulder Field is even higher up at an elevation of 12,750 feet. The high altitude toilets are maintained once a week during the summer. Waste from the toilets passes through solar-heated trays, where up to 70% of the moisture is removed by solar heat, wind and solar-powered fans. The remaining waste solids are shoveled into bags and packed out on llamas. Longs Peak.
context_page_description: A working animal or draught animal is an animal, usually domesticated, that is kept by humans and trained to perform tasks. They may be pets or draft animals trained to achieve certain tasks, such as guide dogs, assistance dogs, draft horses or logging elephants. Most working animals are either service animals or draft animals. They may also be used for milking or herding. Some, at the end of their working lives, may also be used for meat or other products such as leather.
  The history of working animals may predate agriculture, with dogs used by our hunter-gatherer ancestors. Around the world, millions of animals work in relationship with their owners. Domesticated species are often bred for different uses and conditions, especially horses and working dogs. Working animals are usually raised on farms, though some are still captured from the wild, such as dolphins and some Asian elephants.
  People have found uses for a wide variety of abilities in animals, and even industrialized societies use many animals for work. People use the strength of horses, elephants, and oxen to pull carts and move logs.
context_section_description: Pack animals may be of the same species as mounts or harness animals, though animals such as horses, mules, donkeys,  reindeer and both types of camel may have individual bloodlines or breeds that have been selectively bred for packing. Additional species are only used to carry loads, including llamas in the Andes.
  Domesticated cattle and yaks are also used as pack animals. Other species used to carry cargo include dogs and pack goats.
caption: A pack llama
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