Depends on where you are. In some areas, natural prey is scarce. This makes livestock a much more attractive target, and when predators are very hungry, they're more likely to take on your LGD. Other areas have plenty of natural prey available for predators, so they aren't as desperate for a meal, so they're less likely to challenge your LGD. A predator will naturally be more inclined to choose a lower risk target, if they're easy to find. Around here, I think our predator problems have been relatively minor, because there's such an abundance of food in the area. Not because there's any shortage of predators. We have foxes, coyotes, owls, raccoons, skunks, possums, hawks, and an occasional bobcat. They have deer, rabbits, squirrels, wild turkey, groundhogs, moles, gophers, all kinds of rodents and small birds, etc., to dine on. Not to mention aquatic prey, crawfish, frogs, etc. Get out on the plains or in the desert, it's different. Less prey, not so readily found.