Because they have such an efficient digestive system and a relatively low protein requirement, they can be kept on a variety of suitable pastures or hay, supplemented with recommended vitamins, minerals, and salt. Yes, they are. Llamas are very sociable herd animals. They need the companionship of other llamas. They are very curious and are basically gentle.
Llamas communicate by humming.
They also express themselves through body language. They use their tails and ears as signals to other llamas. If you pay attention you too can learn the llama language. On occasions they will alert each other when there might be danger afoot. Then, llamas emit a loud alarm call that is hard to miss.