What to Feed an Alpaca With Diarrhea: Diet Changes and When to Call the Vet

Diarrhea in alpacas is a symptom, not a diagnosis. In adults, it may be triggered by parasites such as coccidia or Giardia, sudden diet changes, grain overload, toxic plants, bacterial disease, or other intestinal problems. Camelids can hide illness well, so even a mild-looking change in manure deserves close watching.

The first diet goal is to reduce digestive stress while your vet helps find the cause. In many cases, that means feeding plain, good-quality grass hay and pausing grain, rich alfalfa-heavy meals, lush pasture, produce, and sweet feeds until your vet advises otherwise. Keep water clean and easy to reach. If your alpaca is still interested in eating, small frequent access to familiar hay is usually gentler than offering a lot of different feeds at once.

Do not force-feed supplements, oils, or home remedies unless your vet specifically recommends them. Electrolytes may help some dehydrated camelids, but the right product and route depend on the alpaca's age, hydration status, and the cause of the diarrhea. Severe cases often need prescription treatment and fluids, not diet changes alone.

Because some causes of diarrhea are contagious or zoonotic, isolate the affected alpaca from shared feed and water when possible, wear gloves, and clean manure-contaminated areas promptly. Your vet may recommend fecal testing, bloodwork, and hydration assessment before advising a more tailored feeding plan.

For an adult alpaca with diarrhea that is still standing and willing to eat, the safest starting point is usually normal access to familiar grass hay and water rather than fasting. Alpacas on maintenance commonly eat about 1% to 2% of body weight in dry matter per day, with many references clustering around 1.5% to 1.8%. A 150-pound alpaca may therefore consume roughly 1.5 to 2.7 pounds of dry matter daily, depending on body condition, forage quality, weather, and health status.

In practical terms, let your alpaca nibble hay steadily instead of pushing concentrates. If hay intake drops, that matters. Reduced appetite plus diarrhea raises the risk of dehydration and energy deficit, especially in thin animals, seniors, pregnant females, and crias.

Avoid grain unless your vet tells you to keep using a specific ration. Grain and sugary feeds can worsen digestive upset and, if overeaten, may contribute to serious gastrointestinal problems. If your alpaca normally receives a pelleted camelid ration or mineral supplement, ask your vet whether to pause it temporarily or continue a reduced amount.

Crias are different. They can become dehydrated much faster, and milk intake, nursing behavior, and body weight all matter. If a cria has diarrhea, do not rely on diet changes alone. See your vet promptly for feeding and fluid guidance.

See your vet immediately if your alpaca has watery diarrhea, weakness, repeated lying down, trouble standing, no interest in feed, a swollen belly, signs of pain, or obvious dehydration. Warning signs of dehydration can include tacky gums, sunken eyes, delayed capillary refill, and reduced manure or urine output. In camelids, serious fluid loss can develop before the situation looks dramatic.

Blood or mucus in the stool, fever, rapid breathing, a fast heart rate, weight loss, or diarrhea lasting more than 24 hours in an adult are also strong reasons to call your vet. In crias, the threshold is lower. Even a short period of diarrhea can become urgent because young camelids have less reserve.

You should also call sooner if multiple alpacas are affected, if there was recent access to new pasture, grain, or possible toxins, or if the alpaca has a history of parasites. Some infectious causes can spread through fecal contamination, and some may pose a risk to people handling manure.

If you are unsure whether the manure is truly diarrhea, take photos and note the exact date and time you first noticed the change. That information helps your vet decide how aggressive the workup should be.

If you were thinking about feeding treats or rich feeds to keep calories up, safer alternatives are usually much plainer. Start with clean grass hay, fresh water, shade or shelter, and close monitoring. That approach supports the gut without adding extra starch or sugar.

If your alpaca normally grazes lush pasture, your vet may suggest temporarily limiting pasture time and using hay instead. If your alpaca is on a concentrate, your vet may recommend holding it for a short period or reintroducing it gradually once manure improves. For some animals, a camelid-specific mineral may still be appropriate, but this should be individualized.

Ask your vet before using probiotics, oral electrolytes, bismuth products, dewormers, or anti-diarrheal medications. These are not one-size-fits-all in alpacas, and the wrong choice can delay diagnosis or miss a more serious intestinal problem.

The safest "alternative" to home treatment is often a basic veterinary workup early in the course of illness. A fecal exam, hydration check, and targeted treatment plan can prevent a mild case from turning into a much more serious one.