SpittingNot all alpacas spit, but all are capable. "Spit" is somewhat euphemistic. While occasionally the projectile contains only air and a little saliva, the alpaca often bring up and project regurgitated stomach contents.Spitting is mostly reserved for other alpacas, not for humans, but sometimes a human gets in the line of fire. If an alpaca is extremely displeased at a human, that person may well become covered in smelly, green goo. The smell is so foul that many people who work with alpacas would much rather come into contact with alpaca feces than with alpaca spit.For alpacas, spitting results in what is called "sour mouth." Sour mouth is characterized by a loose-hanging lower lip and a gaping mouth. This is caused by the stomach acids and unpleasant taste of the contents as they pass out of the mouth.Some alpacas will spit when looked at, others will never spit — their personalities are all so individualized that there is no hard and fast rule about them in terms of social behavior.http://en.wikipedia.org/wiki/Alpaca
Very dangerous and horrible animal it is! Beware! You don't want to fool around with a camelid!