Dreamcatcher Alpacas
Alpaca health · Nutritional & metabolic

Obesity in Alpacas

Updated 2026-10-02By the Dreamcatcher Alpacas editorial team4 peer-reviewed references
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Monitor and manage

Usually manageable with good husbandry; involve your vet if it worsens.

Very common in pet and fiber alpacas. Excess fat hides under the fleece, so owners often miss it until health problems appear.

Category
Nutritional & metabolic
Urgency
Monitor and manage

Signs & symptoms

  • Body condition score above 3.5 out of 5 (no spine felt along the back)
  • Fat pads on the chest and between the front legs
  • Heat intolerance
  • Fertility problems

What causes it?

Too much grain, pellets, treats or rich (alfalfa, lush) forage for an animal's needs and activity.

Risk factors

  • Idle fiber males and pets
  • Free-choice pellets
  • Alfalfa-only diets

How vets diagnose it

Hands-on body condition scoring along the backbone and ribs, and regular weighing.

Treatment

Gradual weight loss: grass hay instead of alfalfa, remove grain and treats, keep a balanced mineral, increase exercise.

Prevention

  • Weigh monthly or body-score at every handling
  • Feed pellets only as needed to balance minerals

Background

Obesity is a medical condition, considered a disease by multiple organizations, in which excess body fat has accumulated to such an extent that it can have negative effects on health. People are classified as obese when their body mass index (BMI)—a person's weight divided by the square of the person's height—is over 30 kg/m2; the range 25–30 kg/m2 is defined as overweight. Some East Asian countries use lower BMI thresholds to define obesity. Obesity is a major cause of disability and is correlated with various diseases and conditions, particularly cardiovascular diseases, type 2 diabetes, obstructive sleep apnea, certain types of cancer, and osteoarthritis.From Wikipedia — “Obesity”, licensed under CC BY-SA 4.0.

Research & references

PubMed lists 4 peer-reviewed papers on this topic in camelids. The most relevant include:

  1. Effect of body mass index on response to neo-adjuvant therapy in HER2-positive breast cancer: an exploratory analysis of the NeoALTTO trial. Di Cosimo S, Porcu L, Agbor-Tarh D et al. Breast cancer research : BCR, 2020. PubMed 33109233 · DOI · Free full textOpen access · cited 23×
  2. Tooth root abscesses in llamas and alpacas: 123 cases (1994-2005). Niehaus AJ, Anderson DE Journal of the American Veterinary Medical Association, 2007. PubMed 17630900 · DOI · cited 31×
  3. The influence of different examiners on the Body Condition Score (BCS) in South American camelids-Experiences from a mixed llama and alpaca herd. Wagener MG, Schregel J, Ossowski N et al. Frontiers in veterinary science, 2023. PubMed 36816196 · DOI · Free full textOpen access · cited 8×
  4. Conservative management of a ruptured gastrocnemius muscle in a male llama. Tyler JW, Middleton JR, Barbee DD et al. The Canadian veterinary journal = La revue veterinaire canadienne, 1998. PubMed 9818139 · cited 2×

Frequently asked questions

What is obesity in alpacas?
Very common in pet and fiber alpacas. Excess fat hides under the fleece, so owners often miss it until health problems appear.
What are the signs of obesity?
Body condition score above 3.5 out of 5 (no spine felt along the back), fat pads on the chest and between the front legs, heat intolerance and fertility problems.
How do you prevent obesity?
Weigh monthly or body-score at every handling. Feed pellets only as needed to balance minerals.
Is obesity an emergency?
Monitor and manage. Usually manageable with good husbandry; involve your vet if it worsens.

This page is educational and does not replace advice from a veterinarian who has examined your animals. Camelid medicine uses many drugs “extra-label”, so dosing must come from your vet. In an emergency, call your vet first. Read our disclaimer · How we write and review content.