Llama
For the most part, llamas (and alpacas) are pretty docile animals and used to guard small dogs. Any sign of aggression a llama displays toward its own kind is for disciplinary purposes. When it comes to human interaction, if a llama is bottle-fed or over-handled in its youth, it becomes more attached to its owner and begins to think of a human as its own kind. Common behaviors that would be displayed during this time are spitting, neck wresting, and if severe, berserk llama syndrome where the imprinting has led to attacks such as chest biting and ramming.