Choanal Atresia in Alpacas: Congenital Nasal Obstruction and Breathing Trouble
- See your vet immediately if a newborn alpaca has noisy breathing, open-mouth breathing, or struggles to nurse.
- Choanal atresia is a congenital defect where the back of one or both nasal passages fails to open normally.
- Because alpacas are obligate nasal breathers, affected crias can become distressed fast, especially during nursing.
- Some crias have partial or one-sided blockage and milder signs, but bilateral blockage is often life-threatening.
- Diagnosis usually involves a physical exam plus attempts to pass a small catheter, endoscopy, and sometimes skull imaging or CT.
- Treatment options range from supportive care and quality-of-life planning to referral surgery and temporary airway support.
What Is Choanal Atresia in Alpacas?
Choanal atresia is a birth defect in which the choanae, the normal openings between the back of the nasal passages and the throat, do not form correctly. The blockage may be partial or complete, and it may affect one side or both sides. In alpacas and llamas, this is one of the best-recognized congenital defects.
This matters because alpacas are obligate nasal breathers. A cria with blocked nasal passages may breathe with obvious effort, make loud respiratory sounds, or become much more distressed while nursing. Milk can also be inhaled into the airways during these episodes, which raises the risk of aspiration pneumonia.
Signs are often noticed in the first hours to days of life, but milder cases can be missed at first. A cria with unilateral or partial obstruction may survive longer and show chronic noisy breathing, poor growth, or repeated respiratory problems. Your vet can help sort out whether the problem is choanal atresia or another cause of upper-airway obstruction.
Symptoms of Choanal Atresia in Alpacas
- Open-mouth breathing
- Noisy breathing or loud snoring sounds
- Breathing distress during nursing
- Milk coming from the nose or coughing after nursing
- Poor latch, weak nursing, or slow weight gain
- Exercise intolerance or tiring quickly
- Blue-tinged gums or collapse
- Repeated respiratory infections or pneumonia
See your vet immediately if a cria has open-mouth breathing, worsening effort to breathe, trouble nursing, milk from the nose, weakness, or blue gums. These signs can progress quickly in newborn camelids. Even if the cria seems stable between feedings, distress that appears during nursing is enough reason for urgent evaluation.
What Causes Choanal Atresia in Alpacas?
Choanal atresia is congenital, which means the cria is born with it. During fetal development, the back of the nasal passage does not open normally into the nasopharynx. The obstruction may be made of soft tissue, bone, or a mix of both.
In camelids, the condition is widely considered to have a heritable component, even though the exact genetic mechanism has not been fully worked out. Research has looked at the CHD7 gene because of similarities to a human syndrome associated with choanal atresia, but that work did not identify a single clear primary mutation responsible for all alpaca cases.
Other developmental factors may also play a role, but from a herd-health standpoint, breeding history matters. If a cria is affected, your vet may advise discussing the sire, dam, and related animals with your breeding program veterinarian before repeating that pairing.
How Is Choanal Atresia in Alpacas Diagnosed?
Your vet will start with the cria's age, breathing pattern, nursing history, and a careful physical exam. Affected crias often have inspiratory noise, increased effort, and distress that becomes more obvious while trying to nurse. One practical field clue is failure to pass a small red rubber catheter or feeding tube through the nostril into the pharynx.
Diagnosis is then confirmed with airway-focused testing. Depending on what is available and how stable the cria is, this may include endoscopy, skull radiographs, or CT to define whether the blockage is unilateral or bilateral and whether it is mainly membranous or bony. These tests also help your vet plan whether surgery is realistic.
Your vet may also check for complications such as aspiration pneumonia, dehydration, low blood sugar, or poor passive transfer in a weak neonate. In some crias, choanal atresia occurs along with other congenital defects, so a broader exam is important before making treatment decisions.
Treatment Options for Choanal Atresia in Alpacas
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Urgent farm or clinic exam
- Airway assessment and attempt to pass a nasal catheter
- Pulse oximetry if available and basic neonatal stabilization
- Bottle or tube-feeding guidance only if your vet feels it is safe
- Discussion of prognosis, quality of life, and humane euthanasia when obstruction is severe
Recommended Standard Treatment
- Full veterinary exam and neonatal supportive care
- Catheter test plus referral-level confirmation with endoscopy or radiographs
- Bloodwork and pneumonia screening as needed
- Short-term oxygen support and feeding plan
- Referral consultation with a camelid-experienced surgeon to discuss candidacy
Advanced / Critical Care
- Referral hospitalization and intensive neonatal monitoring
- Advanced imaging such as CT for surgical planning
- Temporary airway procedures such as tracheostomy when needed
- Surgical creation or enlargement of the choanal opening, often with postoperative stenting or repeated debridement
- Postoperative antibiotics, anti-inflammatory medication, recheck exams, and monitoring for restenosis or aspiration pneumonia
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Choanal Atresia in Alpacas
Bring these questions to your vet appointment to get the most out of your visit.
- Does this cria seem to have complete blockage, partial blockage, or one-sided disease?
- Is it safe for this cria to nurse, or do we need a different feeding plan right now?
- What tests can confirm the diagnosis on-farm, and what would require referral?
- Do you suspect aspiration pneumonia or other complications already?
- Is this cria a realistic surgical candidate, and what outcome should we expect?
- If surgery is pursued, will a tracheostomy, stent, or repeat procedure be likely?
- What warning signs mean we should return immediately after discharge?
- Should the sire and dam be removed from future breeding plans because of possible heritability?
How to Prevent Choanal Atresia in Alpacas
There is no vaccine or supplement that prevents choanal atresia, because it develops before birth. Prevention focuses on breeding decisions and early newborn monitoring. If a cria is born with choanal atresia, many camelid veterinarians recommend avoiding repeat breedings of that same sire-dam pair until your vet has reviewed the history.
It is also wise to keep good herd records for congenital defects, including facial abnormalities, wry face, atresias, and unexplained neonatal respiratory distress. If more than one related cria is affected, your vet may advise removing certain animals from the breeding program.
After every birth, watch the cria closely during the first nursing attempts. Noisy breathing, panic while suckling, or milk from the nose should never be brushed off as normal adjustment. Early recognition does not prevent the defect, but it can reduce suffering and help your vet guide the next steps quickly.