Ours have never bitten anyone either. Or even charged or acted aggressive . The most they do is bark and/or become a physical wall between any threats and the goats. I often have have kids visit the goats and the dogs just stand between the kids and the goats until they see it’s ok and then they just go about their business.
Ours was bred on a goat farm, she was one of 11!. Her mother and father were amazing. When goats were born, Archie the male would lead the pack of 5 and lick the baby goats clean. The young dogs would follow suit. What they were doing was leaving their scent on the baby goats to protect them. Pretty amazing.