Alpacas (Vicugna pacos) are domesticated South American camelids selected for fleece, calm herd behavior, and efficient use of rough forage. Most adults stand 4.5 to 5 feet (1.4 to 1.5 meters) at the withers and weigh 100 to 200 pounds (45 to 91 kilograms), with females often on the lighter end and castrated males somewhat heavier. Individuals commonly live 15 to 20 years when nutrition, dentition, parasite control, and social stability are steady. Because they are hindgut fermenters with a three-compartment stomach that excels on grass hay and pasture, the way food is bought, stored, and offered influences body condition, fleece quality, and digestive health as much as the label on the bag.
Good storage does not change what an alpaca should eat, but it protects what that feed was meant to deliver. Hay can lose vitamins, collect mold, or become dusty between baling and feeding. Pellets and mineral mixes can cake, oxidize, or be visited by rodents. Water can grow biofilm in a warm tank. This article works through practical storage, preparation, and feeder choices that keep forage, concentrates, and water clean, consistent, and safe to eat, while keeping daily work realistic for the people doing the feeding.
Why storage quality matters as much as ration quality
An excellent ration on paper can fail in the barn. Alpacas depend on long-stem fiber to keep fermentation compartments moving steadily. If hay has been rained on, stored while still damp, or left in a hot, humid shed for months, mold, dust, and nutrient loss can creep in before the animal ever takes a bite. Visible mold is an obvious reason to discard a bale, but invisible changes matter too: carotene and vitamin E decline during prolonged storage, palatability drops as leaves shatter, and dusty bales irritate airways when shaken into a feeder in a closed barn.
The same principle applies to bagged feeds. A pelleted alpaca supplement is formulated around specific protein, fiber, calcium-to-phosphorus ratios, and added copper, selenium, and vitamins. Once the bag is opened, heat above about 75 degrees Fahrenheit (24 degrees Celsius), moisture, and oxygen begin to degrade fat-soluble vitamins and fats. Rodent droppings or insect frass add contamination that is easy to miss in a dim feed room. Buying the right product matters, but keeping it dry, cool, sealed, and used within its expected window matters just as much, especially for pregnant females, growing crias, and thin seniors.
Hay as the foundation: buying, storing, and checking quality
Most non-lactating adults do well when long-stem grass hay provides the bulk of dry matter, with pasture and a small amount of concentrate filling gaps. Orchard grass, timothy, and other mixed grass hays are common choices because they tend to be moderate in protein and calcium, with a texture alpacas can chew thoroughly. Alfalfa can be used strategically for late-gestation females or thin animals needing more calories and protein, but its higher calcium and calorie density make it less ideal as the sole hay for easy keepers. Knowing the lot matters: ask for a cutting date and if possible a hay analysis showing moisture at baling and protein.
At purchase, look closely at the bales. Well-made grass hay should be green to green-gold, smell fresh and slightly sweet rather than musty or caramelized, and contain abundant leaves and fine stems. Reject bales that feel heavy and damp, show dark patches or white mold pockets inside the flakes, or have been tied with weakened twine. Any bale that was rained on after cutting or stored directly on bare soil without a vapor break deserves extra scrutiny, because moisture wicks from the ground overnight.
Recognizing good grass hay versus compromised bales
Open one or two representative bales from each new lot and pull flakes apart in a well-ventilated area. Good flakes separate cleanly with little dust, and you should see more leaf than stem. Dust clouds, a tobacco-like smell, or warm interiors after stacking suggest heating and microbial growth, even if outer surfaces look fine. Photograph the lot tags and keep a small sample flake in a labeled bag for a week; if animals later show coughing or loose stool, you have a reference point to discuss with a veterinarian.
Stacking and airflow that prevent mold
Store hay off the floor on pallets at least 4 to 6 inches (10 to 15 centimeters) high, with 4 to 6 inches (10 to 15 centimeters) of air space between the top of the stack and any wall. Do not push fresh deliveries tight against older stacks; leave an aisle so air can move and you can inspect twine and reach the oldest hay first. A barn temperature near 50 to 70 degrees Fahrenheit (10 to 21 degrees Celsius) with relative humidity below about 65 percent slows mold growth far better than a metal shed that swings from near freezing to over 100 degrees Fahrenheit (38 degrees Celsius) in summer. Where humidity runs high, a simple thermometer and hygrometer, checked weekly, tells you whether adding ventilation helps.
Concentrates, minerals, and supplements: keeping potency and preventing cross-contamination
Bagged concentrates and mineral mixes are the most perishable part of the diet after fresh pasture. Whole grains and unprotected fats oxidize faster than low-fat pellets, and vitamin premixes lose activity over time, especially when exposed to heat and light. In a typical barn, an unopened bag stored at 60 to 70 degrees Fahrenheit (16 to 21 degrees Celsius) will hold label potency for the months stamped on the tag, often 3 to 6 months from milling. Once opened, aim to use the bag within 30 to 45 days, resealing tightly between feedings.
Transfer to clean, food-grade containers only if the original bag cannot be resealed. Label each bin with product name, lot number, purchase date, and expiration date copied from the tag, and wash and fully dry the bin before refilling. Never top off a half-empty bin with new product; finish the old lot completely so stale fines do not accumulate. Keep minerals and salt in separate, dry containers rather than mixing a large batch ahead of time, because minerals cake with humidity.
Store alpaca feed away from cattle or horse feeds that may contain ionophores or urea, and away from poultry feeds that carry different medications. Use a dedicated scoop for each product, hang it above the bin rather than inside dusty feed, and sweep spilled fines promptly so rodents and insects are not rewarded. If any bag shows evidence of gnawing, water stains, or a rancid smell, discard it rather than trying to salvage the unaffected portion.
Water storage and delivery: the overlooked half of feeding
Clean water is a feed ingredient, not an accessory. Alpacas often drink 2 to 4 gallons (7.5 to 15 liters) per head per day in temperate weather, and more during heat, lactation, or when eating dry hay. Water that is warm, algae-filled, or tainted with manure reduces intake and can carry parasites or bacteria. Tanks, buckets, and automatic waterers all work when they are sized, placed, and cleaned on a schedule.
For hauled or stored water, use food-grade hoses and tanks, keep tanks covered, and scrub and rinse them at least weekly in summer and every one to two weeks in cooler months. Position tanks on well-drained pads at least 20 to 30 feet (6 to 9 meters) from manure piles, and raise buckets 18 to 24 inches (46 to 61 centimeters) to reduce splashed bedding and fecal contamination. Heated buckets are helpful below freezing, but inspect cords and anchor heaters so animals cannot chew them, and check water temperature by hand; water above about 75 degrees Fahrenheit (24 degrees Celsius) can discourage drinking if the barn is very warm.
Pasture, browse, and seasonal forage handling
Pasture helps alpacas exercise and select forage, but it requires storage-style thinking outdoors. Rotate grazing rather than allowing continuous close grazing to 1 to 2 inches (2.5 to 5 centimeters), which stresses plants and increases parasite ingestion near manure. A simple two- to four-paddock rotation with rest periods of 3 to 6 weeks in the growing season keeps sward height closer to 4 to 8 inches (10 to 20 centimeters) where leaves are clean. Collect dung piles or harrow when animals are off the paddock and conditions are dry, because alpaca dung piles are localized and easy to manage.
Spring flush pasture is lush and high in moisture; introduce it gradually over 7 to 14 days if animals have been on hay all winter, and still offer hay for fiber. Summer hay cuttings made during hot, dry spells may be coarse and lower in leaf; winter hay carried over from the previous year should be fed earlier in the cold season while vitamins are higher. Fallen fruit, acorns, and ornamental trimmings should never be dumped into pastures, because moldy fruit can cause choke and some ornamentals such as yew, oleander, and red maple are hazardous.
Feeder and storage equipment: design for alpaca safety
Feeders determine whether careful storage pays off. Alpacas eat with a narrow muzzle and work best when the head is at or slightly below shoulder level. A shallow, smooth trough 8 to 12 inches (20 to 30 centimeters) deep, with rounded corners and a feed surface 12 to 20 inches (30 to 51 centimeters) above the ground, allows several animals to eat side by side without crowding, and it can be emptied and brushed daily. Deep, narrow containers with sharp corners trap moist feed and grow mold at the bottom.
Ground feeders, troughs, and hay nets
Ground feeding directly on soil increases sand ingestion and makes parasite control harder. Use hay racks with openings 3 to 4 inches (7.5 to 10 centimeters) wide that let hay be pulled without catching the head, and avoid small-mesh hay nets designed for horses that can snag feet or fleece, especially for crias. For adults, a rack length of about 18 to 24 inches (46 to 61 centimeters) per animal reduces displacement at feeding time. If you feed hay on the ground during dry weather, use a clean rubber mat that can be moved and washed.
Rodent, bird, and moisture control in the feed room
Store bags and bins at least 18 inches (46 centimeters) away from walls where possible, keep a 12-inch (30-centimeter) clear perimeter for inspection, and seal holes larger than 0.25 inches (6 millimeters) that mice can use. Clean up spilled grain within hours and fix roof leaks promptly, because damp insulation above a bin can drip water unseen. Metal bins with gasketed lids discourage chewing, but they do not replace sanitation; remove old fines behind bins monthly and compost spoiled feed away from animal areas.
Preventing toxins, choke, and digestive upset from poorly prepared feed
Two common emergencies link directly to preparation: choke on dry pellets eaten too quickly and digestive upset from mold or sudden changes. Alpacas that are crowded at a trough or offered long, stemmy hay they cannot chew well are more likely to pack feed in the esophagus. Prevent this by providing adequate feeder space, chopping overly coarse hay for older animals with worn teeth, and always offering long-stem hay alongside any concentrate.
Before feeding, shake out flakes over a light tarp and look for foreign material or dark mold veins. Smell bagged feed after opening; a musty or paint-like odor suggests spoilage. Never feed lawn clippings that have heated in a pile, roadside hay that may have been sprayed, or any feed that was submerged in floodwater. In regions with selenium-poor soils, follow your veterinarian's mineral plan rather than adding multiple selenium sources.
Daily and weekly routines that keep feed consistent
Each morning, refresh water before hay, because animals that drink first often eat more steadily. Brush hay racks to remove overnight fines. Offer hay at a measured weight rather than by vague flakes; for example, a 120-pound (54-kilogram) adult at maintenance on moderate-quality grass hay might receive 1.5 to 2 percent of body weight in dry hay per day, divided into two feedings. Use a hanging scale for pellets and minerals and watch body condition scores monthly to adjust.
Weekly, rotate stock: move the next-oldest bales to the front, consolidate opened bags, and inspect bins for condensation or insect webs. Sweep the feed room and confirm lids seal. Monthly, reassess inventory; late winter and early spring are common pinch points when hay supplies tighten, so plan purchases 6 to 8 weeks before you would otherwise run out. Keep a simple log noting hay lot, pellet lot, amounts fed, refusals, and any stool changes.
When stored feed becomes a veterinary question
Refusal of a familiar hay lot by multiple animals, coughing after eating dusty hay, repeated choke episodes, or sudden loose stool across a group suggest a forage issue rather than an individual illness. In those cases, remove the suspect lot, save a labeled sample including tags, photograph mold or foreign material, and offer a known safe hay from a different lot while you call. Do not attempt to dilute visibly moldy hay with good hay or wash it.
A single alpaca that drops wads of partially chewed hay, eats slowly, or loses weight despite good appetite may have dental disease that makes long-stem hay difficult, and the solution may be a dental exam and a softer chop rather than more pellets. Bring recent fecal egg counts, body weights, and feed labels to the appointment so the veterinarian can distinguish feed-related problems from other causes.
Keeping food preparation reliable through seasons and staff changes
The most durable feeding program survives vacations and new helpers because it is written down. A one-page chart posted in the feed room, showing each pen, hay type and weight per feeding, pellet amounts per animal, and water tank locations, prevents the common error of filling a trough to the brim when the instructions called for two measured flakes. Include photos of the correct scoop level and note the location of oldest hay.
In winter when temperatures regularly fall below 30 degrees Fahrenheit (minus 1 degree Celsius), many alpacas need more hay for heat production, and water freezing checks become part of feeding. In hot months when highs exceed 80 degrees Fahrenheit (27 degrees Celsius), feeding hay during cooler morning and evening hours and cleaning water tanks more often reduces heat stress. Review the plan with relief caretakers before they are needed and keep lot numbers together. When preparation is consistent, alpacas show it through steady body condition and quiet chewing throughout the day.