Dreamcatcher Alpacas
Alpaca health · Digestive problems

Megaesophagus in Alpacas

Updated 2026-10-02By the Dreamcatcher Alpacas editorial team4 peer-reviewed references
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Book a vet visit soon

Not usually an emergency, but it needs a diagnosis and a plan.

A dilated, weak esophagus that cannot move food properly, leading to regurgitation and weight loss.

Category
Digestive problems
Urgency
Book a vet visit soon

Signs & symptoms

  • Regurgitating food
  • Weight loss
  • Recurrent pneumonia (aspiration)
  • Swelling of the neck after eating

Related symptom guides: Feed Coming from the Nose.

What causes it?

Unknown in most camelid cases; possibly congenital or neuromuscular.

How vets diagnose it

Contrast radiographs and endoscopy.

Treatment

Management with elevated feeding and soaked feed; prognosis is guarded.

Prevention

  • None specific

Background

Megaesophagus, also known as esophageal dilatation, is a disorder of the esophagus in humans and other mammals, whereby the esophagus becomes abnormally enlarged. Megaesophagus may be caused by any disease which causes the muscles of the esophagus to fail to properly propel food and liquid from the mouth into the stomach. Food can become lodged in the flaccid esophagus, where it may decay, be regurgitated, or be inhaled into the lungs.From Wikipedia — “Megaesophagus”, 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. Megaesophagus in 15 llamas: a retrospective study (1985-1993). Watrous BJ, Pearson EG, Smith BB et al. Journal of veterinary internal medicine, 1995. PubMed 7760315 · DOI · cited 11×
  2. Locally Transmitted Trypanosoma cruzi in a Domestic Llama (Lama glama) in a Rural Area of Greater New Orleans, Louisiana, USA. Thompson JM, Habrun CA, Scully CM et al. Vector borne and zoonotic diseases (Larchmont, N.Y.), 2021. PubMed 34342513 · DOI · cited 2×
  3. Esophageal dysfunction in four alpaca crias and a llama cria with vascular ring anomalies. McKenzie EC, Seguin B, Cebra CK et al. Journal of the American Veterinary Medical Association, 2010. PubMed 20673113 · DOI · cited 9×
  4. Persistent right aortic arch in a mature llama. Butt TD, MacDonald DG, Crawford WH The Veterinary record, 2001. PubMed 11232929 · DOI · cited 5×

Frequently asked questions

What is megaesophagus in alpacas?
A dilated, weak esophagus that cannot move food properly, leading to regurgitation and weight loss.
What are the signs of megaesophagus?
Regurgitating food, weight loss, recurrent pneumonia (aspiration) and swelling of the neck after eating.
How do you prevent megaesophagus?
None specific.
Is megaesophagus an emergency?
Book a vet visit soon. Not usually an emergency, but it needs a diagnosis and a plan.

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.