Alpacas Are Prey, and Their Behaviour Proves It
Alpacas survive in the wild by vigilance, grouping, and flight, and domestic herds keep all three instincts intact. They have no horns, no useful bite for defence, and no kick that will deter a determined dog. What they do have is an alarm call, a tendency to bunch tightly and face a threat together, and legs built for running on open ground. Your protection plan has to supply the defence their bodies lack, because once a predator is inside the fence, the herd's options are poor.
Know your actual threats rather than a generic list. In most areas the serious dangers are roaming or feral dogs — the commonest cause of catastrophic losses, because dogs chase and injure animal after animal — coyotes working singly or in pairs, and foxes, which mainly threaten newborn and young alpacas. Large birds can endanger an unattended newborn. Each threat argues for the same foundations: fencing that excludes, herd living, and secure nights.
Fencing That Keeps Dogs and Diggers Out
Build the perimeter for the predator, not the alpaca. Alpacas themselves rarely challenge a fence, but the mesh must have no gap a dog can force, no bottom space a fox can slip beneath, and no loose section that lifts. Fine, tight mesh is better than widely spaced strands a predator can pass between, and the bottom line should be pinned, buried, or skirted outward so digging meets resistance immediately. Walk the line looking for the beginnings of digs, fallen branches creating bridges, and gates hung with a gap beneath.
Height and visibility matter where dogs patrol a boundary. A fence a dog can see through invites testing and excites chasing along the line, which stresses the herd even without entry, so solid lower sections or planting along a problem boundary can calm a known trouble spot. Gates need positive latches that cannot be rattled loose, and any gate a vehicle uses needs a closing routine everyone follows, every single time.
Herd Living, Young Animals, and the Night Yard
Never keep an alpaca alone. A single animal is stressed, constantly vigilant, and unable to rest properly — and a predator that does get in faces no group confusion at all. Keep the herd together, give them an open area where they can see approaching movement, and avoid grazing them in scrubby corners or along wooded edges where predators can approach under cover unseen.
Bring the herd into a smaller, secure yard or field shelter close to the house for the night, when most attacks happen. Good lighting, human proximity, and a tight night fence change the odds more than any daytime measure. During birthing season, bring mothers and newborns into the secure yard without exception, keep watch over new babies during their first days, and never leave a newborn alone in a far field while you fetch help or equipment.
Some keepers run a guardian — a llama kept with the herd, or a trained livestock guardian dog — and a settled guardian genuinely raises the alarm and confronts intruders. Treat a guardian as an addition to fencing and night housing, never a substitute: an unbonded or young guardian, or one facing several dogs, cannot hold a boundary alone.
After Any Scare, and If the Worst Happens
Walk the herd closely after any disturbance, even if no animal appears hurt. Chase injuries hide under fleece: punctures, torn skin, and strained legs show up as an alpaca hanging back, not grazing, or lying apart from the group, and shock alone can kill a stressed animal hours later. Contact a veterinarian promptly for any alpaca injured, chased hard, or behaving abnormally after an incident, rather than waiting to see whether she recovers on her own.
Repair the entry point before the next nightfall, because a predator that succeeded once returns to the same place. And if an alpaca is chased beyond the fence or goes missing during an attack, immediate local word gives her the best chance of being found before she is hurt or travels far, which is why KinsLe's Lost Pet Alert System helps by alerting nearby members so whoever finds her can message you directly.