I have heard that they make good herd guardians, but never saw it for myself until I was at a friends recently. She has a large goat/sheep herd. Her set up is a large run in barn and 40 fenced outside acres. The animals are free to come and go but are locked inside in the evening. There is a lot of room for all of them inside. Getting to the llamas.... While I was there one of her goats had twins in the barn. Once momma had them cleaned off and up on their feet her two male gelded llamas were making there picks of who would guard the new babies. They each went to the babies and nuzzled them then moved away from the babies and had a spitting fight...face to face with each other. My friend told me that they were deciding who would protect the new babies. It was facinating to watch. Afterward they both layed down for a nap and the older babies cuddled up to them and slept while the mommas were taking a break. I thought it was neat.