Going to have a mountain lion problem in 2-3 years.
OK, so apologies as this is literally a second-hand shaggy-dog story, but here goes:
I coordinate the maintenance of a privately maintained road in the Sierra foothills. I was chatting with the equipment operator we use while waiting for the new tire to arrive to repair a flat on his grader. Anyway... his sister-in-law does goatherd contracts for CALTRANS to manage roadside vegetation. His wife's family is Basque heritage, so there is multiple generations of sheep and goat herding expertise there.
Usually, she deploys 2 or 3 big sheep dogs along with the goats to deter predation. One time on a contract along I-5 she wasn't able to bring the dogs for the first night, and lost two goats to mountain lions overnight.
The cats are out there... they hide well.
There's a good reason they're as widespread as humans. They're machines.
I was thinking a bit longer term. This effectively free new source of food is going to lead to fatter cats who have more kittens, who in turn survive better because there's more food.
EDIT (because I'm apparently "posting too fast"): Yes, dogs traditionally do this in Europe, the States, and other places. I just thought it was interesting that llamas can also do it, since they aren't carnivores. The details of why they do it are also interesting.