Hmmmm. I have had llamas (male and female) for guardians of goats (when I was in high school), they were in the field with the goats and the coyotes stayed away. We also had dogs, but they were closer to the house and not in the field. The llamas were easy going, but skittish and kept to themselves. There may be fiber fanatics in your area that would sheer your llamas, saving you the problem. I don't know what the actual recommendation is, but I know my dad never sheered those llamas, the coats were quite big after a couple years, but they had babies and didn't seem troubled. They had shade and lots of water in 35-40*C weather (Vernon, BC, Canada). Word of warning the male MUST be separated when the female is due.