Alpacas will spit at each other over issues such as food, dominance, protecting their cria and to reject the approach of a breeding male when the female is already pregnant. They are also known to spit at humans during rare occasions of extreme stress, such as shearing. Alpacas make a delightful humming sound and will make a shrill bugle sound to warn the herd of danger. Breeding males also make a unique orgling sound during mating.
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