Crop Stasis, Sour Crop and Crop Burns in Hand-Fed Cockatiel Chicks

PublishedOctober 23, 2026Reading time8 minExoticRx Editorial

Editorially reviewed against published veterinary references. Awaiting credentialed clinical reviewer — our editorial process.

A hand-fed cockatiel chick with a crop that's still full at the next feeding is one of the most common calls an avian clinic gets in breeding season. The owner (often a first-time hand-feeder, sometimes an experienced breeder with a sick clutch) describes a doughy or tight crop, a chick that's quieter than its siblings, maybe a sour smell from the mouth. Crop stasis is a sign rather than a diagnosis, and in chicks the cause is usually found in how the bird is being fed rather than in the bird itself.

Source-cited drug data for this species are on the cockatiel species page, and the cockatiel calculator handles the weight-based math. No doses appear in this article; they live on the drug pages with their citations.

Why the crop stops

Crop motility in a chick depends on warmth, hydration, the right food and a healthy lining. Break any one of those and the crop slows. Then retained formula ferments, yeast and bacteria overgrow, the lining becomes inflamed, motility slows further, and you have a cycle that feeds itself.

The husbandry errors that start it are depressingly consistent:

• formula fed too cool, which chicks often refuse or which sits in the crop, or too hot, which burns
• formula mixed too thick, which dehydrates the chick and packs the crop, or too thin, which underfeeds
• formula mixed in advance and left standing, or leftovers reused at the next feeding
• overfilling the crop at each feeding, which stretches it until it becomes pendulous and empties poorly
• a brooder that's too cool for the chick's age, so energy goes to staying warm and the gut slows
• dirty utensils and syringes, which seed the crop with bacteria and yeast
• feeding again before the crop has emptied, so old formula sits under new

Ask about each of these specifically. Owners rarely volunteer that they microwaved a batch in the morning and used it all day.

Systemic disease also slows the crop, in chicks and in adults. Septicemia, dehydration, polyomavirus in young birds, foreign bodies such as swallowed bedding, and in adult cockatiels heavy metal toxicosis and proventricular dilatation disease (avian bornavirus) all belong on the list. An adult with crop stasis is a different problem from a chick with crop stasis, and it needs a full workup, including radiographs, rather than a change of formula.

The exam and crop cytology

Weigh the chick on a gram scale and compare the weight with the owner's records if they keep them (and suggest they start if they don't). Assess hydration; chicks dehydrate fast, and a dehydrated chick will not move its crop. Palpate the crop gently. A thickened crop wall, which some describe as feeling like a wet towel, suggests chronic ingluvitis, often candidiasis. Look in the mouth for white plaques, which point toward Candida or, less often in this species, trichomoniasis. Smell the breath.

Cytology is the test that tells you what you're dealing with, and it costs almost nothing. Pass a soft feeding tube or a moistened swab into the crop, aspirate a small amount of contents or flush with a little warm sterile saline and aspirate back, and make smears. Stain one with a Romanowsky-type quick stain and one with Gram stain. If trichomoniasis is a possibility, examine a warm wet mount immediately, because the motile organisms stop moving and become hard to see as the sample cools.

Reading the slides takes some judgment. A small number of yeast and a mixed, predominantly Gram-positive bacterial population can be found in healthy birds. Large numbers of budding yeast suggest Candida overgrowth, and pseudohyphae or hyphae suggest invasion of the lining rather than surface colonization, which changes how aggressively you treat. A population dominated by Gram-negative rods, or a monomorphic population of any type, suggests bacterial ingluvitis and justifies culture and sensitivity. Inflammatory cells, if you see them, support true ingluvitis rather than simple stasis. Most of these birds have more than one thing going on; Candida in particular is often secondary to stasis, antibiotic use or another underlying problem.

Stabilizing the chick

The order matters. Warm the chick, rehydrate it, and empty the crop if the contents are sour or the crop is so distended that it can't move. Feed only after the crop is moving.

Emptying a crop is where chicks get hurt. A full, fluid crop can reflux into the oropharynx and be aspirated, especially when the chick is restrained on its back or the crop is massaged hard. Keep the chick upright with the head and neck extended, aspirate gently through a soft tube, and stop if the chick struggles. Large or packed contents may need flushing with small volumes of warm fluid and repeated aspiration. Some severe impactions require anesthesia with an endotracheal tube in place to protect the airway, or surgical ingluviotomy. Vigorous massage of a packed crop in an awake chick risks aspiration and can push material into the proventriculus.

Fluids are the treatment that does the most good. Subcutaneous warmed fluids correct the dehydration that keeps the crop stuck, and once the crop begins to empty, small volumes of very dilute formula or an electrolyte solution can be given by mouth, gradually returning to normal formula over subsequent feedings as the crop proves it can empty. The chick should stay in a warm brooder throughout.

Antifungal options

Nystatin is the traditional first choice for crop candidiasis. It's not absorbed from the gut, so it's very safe, and it works only by contact; it has to coat the lesions to do anything. That has two practical consequences. Giving it by tube directly into the crop bypasses oral and esophageal lesions, so if plaques are visible in the mouth, some of the dose should be given orally. And it can't do much for a crop packed with old formula, so empty the crop first. Resistance to nystatin has been reported, and a chick that doesn't improve on it shouldn't be kept on it indefinitely.

Fluconazole is absorbed systemically and is the usual step up for refractory candidiasis or when cytology shows hyphae suggesting invasive disease. Amphotericin B given orally is another option that, like nystatin, isn't absorbed meaningfully from the gut. All of these are extra-label uses in cockatiels. Doses and durations are on the drug pages.

Antifungals alone rarely cure the problem. If the underlying husbandry error is still there, the yeast comes back.

Bacterial ingluvitis and prokinetics

When cytology points to a bacterial ingluvitis, choose the antibiotic on culture and sensitivity where possible, since Gram-negative organisms in a chick's crop are not predictable. While results are pending, a broad-spectrum agent such as enrofloxacin or trimethoprim-sulfamethoxazole is commonly chosen. Remember that broad-spectrum antibiotics favor yeast overgrowth, which is why many clinicians run antifungal cover alongside antibiotics in chicks.

Prokinetics are often given and less often effective. Metoclopramide and cisapride have been used in birds, but their effect on the avian crop specifically is not well established, and neither should be given when an obstruction hasn't been ruled out. Warmth, fluids and an empty crop do more than any prokinetic.

Crop burns

Crop burns come from formula that's too hot, almost always from microwaving, which creates hot pockets in a mix that feels fine when the owner tests one spot. The burn can be invisible at first. Over the next days the skin over the crop reddens, then discolors, then forms a dry scab, and eventually a fistula opens through which formula leaks onto the chest feathers. Owners often present the chick only at that stage, and they may not connect it to a feeding several days earlier.

The key decision is timing. Attempting surgical repair before the burned tissue has fully demarcated means debriding into tissue that is still dying, and the repair breaks down. Most clinicians manage the chick medically until there's a clear line between healthy and necrotic tissue and the scab has formed, then resect the necrotic tissue and close the crop and skin as separate layers. In the meantime the chick needs smaller, more frequent feedings, fluid support, analgesia, and antimicrobial cover if the wound is contaminated. Small fistulas are sometimes repaired as the chick stabilizes; large ones need careful planning. Prevention is simple: heat formula in a water bath or stir microwaved formula thoroughly, and check the temperature with a thermometer every feeding, not with a finger.

Prognosis and counseling

Chicks with simple stasis from a correctable husbandry error and no major infection usually recover well once warmed, rehydrated and fed correctly. Chronic candidiasis with a thickened crop takes longer and can leave a crop that empties slowly for some time. Pendulous crops sometimes need support with a crop bra (a light elastic bandage) while the chick grows, and severe cases may need surgical reduction. Crop burns repaired at the right time generally heal.

The most useful thing you can do in the exam room is walk through a feeding with the owner: how they mix it, how they check temperature, how much they give, how they know the crop is empty, how they clean the syringes. Ask them to weigh the chick every morning before the first feeding and to call if weight falls or the crop is still full at the next feeding. See the conditions hub for related avian digestive topics and the dosage disclaimer before relying on any drug data from this site.