I know that Llamas are the preferred choice for guard animals but I have an opportunity to purchase a 2 year old female alpaca that has been used as a guard and apparently is pretty good at it. She alerts all the other animals and is always one duty. She sounds like just what I am looking for except that she is an alpaca instead of a llama. She is pretty tame, halter broke, and is good with other livestock. Healthy, UTD on shots. What do you guys think??