Dogs on the trail

[Sanhestar]

I don't see any value in taking a guardian animal (except a livestock guarding or herding dog) with you. The guarding occurs when the lama or the donkey live with your goats permanently. So you have to care for yet another animal with it's own, special needs. Neither donkey nor lama should be kept solitary without members of their own species around. Donkeys are known to attack sheep/goats or play so rough that they injure them.

And if you plan to keep your goats on leash - which is unneccessary - you will have to keep the lama/donkey on leash, too. It can become very tiresome to have your hands full with rope all the time and in a situation of a dog encounter outright dangerous for you and the animals (entangling, ripping out of your hands, etc.)