Dreamcatcher Alpacas
Alpaca health · Digestive problems

Grain Overload (Acidosis) in Alpacas

Updated 2026-10-02By the Dreamcatcher Alpacas editorial team6 peer-reviewed references
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Emergency — call your vet now

This condition can kill within hours. Get veterinary help immediately.

Eating a large amount of grain or concentrate causes acid build-up in the fore-stomach that can be fatal.

Category
Digestive problems
Urgency
Emergency
Also called
Lactic acidosis, Carbohydrate overload

Signs & symptoms

  • Bloating, discomfort
  • Depression, staggering
  • Watery, sour-smelling diarrhea (may be delayed)
  • Dehydration, recumbency, death

Related symptom guides: Alpaca Diarrhea (Loose Stool), Rolling, Kicking at Belly (Colic Signs).

What causes it?

Rapid fermentation of starch to lactic acid after alpacas break into a feed bin or are fed a big grain meal.

Risk factors

  • Unsecured feed rooms
  • Sudden diet changes

How vets diagnose it

History and fore-stomach fluid pH testing.

Treatment

Emergency vet care: antacids, fluids, sometimes surgical emptying of the fore-stomach.

Do not wait to see if it improves. Camelids hide illness, and by the time signs are obvious the problem is often advanced. Call your veterinarian.

Prevention

  • Lock feed rooms and bins
  • Introduce any concentrate gradually
  • Prefer forage-based diets

Research & references

PubMed lists 11 peer-reviewed papers on this topic in camelids. The most relevant include:

  1. Fluid therapy in small ruminants and camelids. Jones M, Navarre C The Veterinary clinics of North America. Food animal practice, 2014. PubMed 24980731 · DOI · cited 5×
  2. Rhododendron poisoning in alpacas (Vicugna pacos) in Northern Germany. Schregel J, Zdora I, Gerhauser I et al. Veterinary research communications, 2024. PubMed 38483734 · DOI · Free full textOpen access · cited 3×
  3. Proteomics of old world camelid (Camelus dromedarius): Better understanding the interplay between homeostasis and desert environment. Warda M, Prince A, Kim HK et al. Journal of advanced research, 2014. PubMed 25685490 · DOI · Free full textOpen access · cited 14×
  4. Forestomach acidosis in six New World camelids. Cebra CK, Cebra ML, Garry FB et al. Journal of the American Veterinary Medical Association, 1996. PubMed 8617651 · cited 10×
  5. Hyperlipemia and ketonuria in an alpaca and a llama. Anderson DE, Constable PD, Yvorchuk KE et al. Journal of veterinary internal medicine, 1994. PubMed 8064656 · DOI · cited 16×
  6. Precision monitoring of rumination and locomotion in relation to milk fat-to-protein ratio in early lactation dairy cattle. Arlauskaitė S, Girdauskaitė A, Rutkauskas A et al. Frontiers in veterinary science, 2025. PubMed 40703924 · DOI · Free full textOpen access · cited 1×

Frequently asked questions

What is grain Overload (Acidosis) in alpacas?
Eating a large amount of grain or concentrate causes acid build-up in the fore-stomach that can be fatal.
What are the signs of grain Overload (Acidosis)?
Bloating, discomfort, depression, staggering, watery, sour-smelling diarrhea (may be delayed) and dehydration, recumbency, death.
How do you prevent grain Overload (Acidosis)?
Lock feed rooms and bins. Introduce any concentrate gradually. Prefer forage-based diets.
Is grain Overload (Acidosis) an emergency?
Emergency — call your vet now. This condition can kill within hours. Get veterinary help immediately.

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.