The animal on the right is a culpe0 (Lycalopex culpaeus) and the animal on the left is a guanaco (Lama guanicoe).
Llamas are derived from guanacoes, though they do have some alpaca blood in them. Alpacas are derived from the vicuña (Vicugna vicugna).
The wild South American camels evolved with canid predation. Culpeos and chillas (L. griseus) often try to attack their offspring.
During the Pleistocene, these camels also suffered from predation from dire wolves.
Because they have evolved with some much predation from canids, they have evolved a certain amount of antipathy toward anything that looks like a dog.
This hatred is a great asset when one uses a llama to guard sheep from coyotes and stray dogs.
It’s not so useful when the llamas won’t let the family dogs cross a pasture.