CONDITION
Gastric Dilatation-Volvulus (GDV) in Dogs
Gastric dilatation-volvulus describes a sequence in which a dog's stomach fills with gas and then rotates on itself, trapping that gas and cutting off blood flow to the stomach wall and sometimes to other organs. The rotation can happen partially or completely, and once it begins, the stomach continues to expand because the gas cannot escape. This is a mechanical problem with profound effects on circulation and tissue viability. Owners most often notice a dog whose abdomen appears swollen or tight, who may be restless, retching without bringing anything up, or standing in an anxious posture. The signs can appear quite suddenly, often in the hours after a meal or a period of activity, though the timing varies. Some dogs show only subtle discomfort at first, but mild early signs do not mean the stomach has not twisted, and the picture can change markedly over a few hours. This page explores what tends to be visible from the outside, what is happening inside the abdomen and the rest of the body when the stomach has twisted, how the condition is confirmed, and the approaches used to address it. It also considers which dogs may be more likely to experience this, and what is understood about the factors that may contribute.
Why this matters now
GDV can occur at any age but is most commonly recognised in large and giant breed dogs, typically from middle age onwards. Certain body conformations, namely deep, narrow chests, are associated with higher prevalence. The condition often develops in the hours following a meal, particularly if the dog has eaten rapidly, consumed a large volume, or exercised vigorously around mealtimes. However, GDV can also occur without any obvious precipitating event, making the timing unpredictable even in dogs with recognised risk factors.
GDV progresses quickly. The initial gastric dilatation, where the stomach fills with gas, fluid, or both, may progress to volvulus, in which the stomach rotates around the point where the oesophagus enters it. This rotation occludes the oesophageal and pyloric outlets, trapping gastric contents, and may compromise the blood supply to the stomach wall and spleen. The resulting cardiovascular compromise can develop within a few hours, with systemic effects including reduced venous return, decreased cardiac output, and progressive circulatory shock. A dog that is restless and retching without result at first can be weak, pale-gummed and unable to stand a few hours later, and GDV can be fatal on the same day the signs begin. Without intervention, the cascade of organ dysfunction can become self-reinforcing as tissue ischaemia releases inflammatory mediators and toxins into the circulation. In a study of 166 dogs treated surgically, signs present for more than 6 hours before examination were associated with higher mortality, more heart rhythm disturbances, and more frequent removal of dead stomach wall or the spleen. In a UK study of dogs seen at out-of-hours practices, about 79% of dogs that had surgery survived to discharge.
Signals & patterns
Early signals
Abdominal distension
The abdomen, particularly the left cranial region, may become visibly enlarged and feel taut or drum-like to the touch. This distension reflects the accumulation of gas within the stomach. It develops progressively and may be slight or hard to see in the early stages, so a normal-looking abdomen does not rule out GDV in a dog that is retching without result.
Non-productive retching
Repeated, forceful attempts to vomit that produce little or no material are a hallmark early signal. The dog may retch, gag, or heave without successfully bringing anything up, as the twisted or distended stomach prevents normal emptying through either the oesophagus or the pylorus.
Restlessness and discomfort
The dog may pace, change positions frequently, appear unable to settle, and show signs of abdominal discomfort. Postures such as adopting a prayer position (front legs down, rear elevated) or standing with the back arched may indicate attempts to relieve abdominal pressure.
Excessive drooling
Profuse salivation often accompanies the nausea and discomfort associated with gastric distension. The dog may produce thick, ropy saliva and may repeatedly lick its lips or swallow.
Looking at the abdomen
The dog may repeatedly turn to look at or nose at its flank or abdomen, reflecting awareness of the unusual sensation of gastric distension and the discomfort it produces.
Later signals
Rapid heart rate and weak pulse
As cardiovascular compromise develops, the heart rate increases as the body attempts to maintain blood pressure despite reduced venous return. The peripheral pulses may feel weak or thready, reflecting poor peripheral perfusion and inadequate cardiac output.
Pale or dark red gums
Changes in mucous membrane colour reflect circulatory compromise. Initially, the gums may become pale as blood flow is redistributed away from the periphery. In later stages, toxin-mediated changes may produce congested, dark red, or muddy-coloured membranes.
Collapse or inability to stand
Progressive cardiovascular collapse may cause the dog to become weak, unsteady, and eventually unable to stand. This collapse reflects the severity of the circulatory compromise and the systemic effects of tissue ischaemia and toxin release.
Rapid, shallow breathing
The distended stomach pushes against the diaphragm, restricting lung expansion and forcing the dog into rapid, shallow breathing patterns. This respiratory compromise compounds the circulatory insufficiency by further reducing oxygen delivery to tissues.
Click to read about the biological mechanisms
How this is usually investigated
Investigation of suspected GDV typically combines rapid clinical assessment with diagnostic imaging to confirm the diagnosis and assess the severity of organ compromise. The speed of investigation reflects the time-sensitive nature of the condition.
Abdominal radiography
Cardiovascular assessment
Blood work
Gastric decompression
Surgical exploration
Options & trade-offs
The management of GDV centres on surgical intervention as the main approach, with the differences lying in the extent of surgical intervention required and the peri-operative management strategies employed.
Surgical de-rotation and gastropexy
Surgical de-rotation of the stomach followed by permanent fixation (gastropexy) to the body wall is the standard approach for confirmed GDV. Various gastropexy techniques exist, including incisional, belt-loop, and circumcostal methods, all aimed at creating a permanent adhesion between the stomach and the abdominal wall to prevent future rotation.
Trade-offs: Surgery carries inherent anaesthetic and surgical risks, which are amplified by the compromised cardiovascular status of the patient. Complications around the time of surgery may include cardiac arrhythmias, gastric necrosis identified after de-rotation, reperfusion injury, and disseminated intravascular coagulation. However, without surgical correction of the volvulus, the condition is almost always fatal. Gastropexy substantially reduces the recurrence rate from as high as 80% to less than 5%.
Prophylactic gastropexy
In breeds at high risk of GDV, some veterinary surgeons offer prophylactic gastropexy, performing the stomach-to-body-wall fixation before GDV occurs, often at the time of neutering or another elective procedure. Laparoscopic-assisted techniques have made this less invasive.
Trade-offs: Prophylactic gastropexy greatly reduces the risk of volvulus (rotation) but does not prevent simple gastric dilatation. It requires an additional surgical procedure with its associated anaesthetic risk, albeit in a healthy dog rather than one already unwell with GDV. The decision involves weighing the statistical risk of GDV for the individual dog's breed and conformation against the risks of elective surgery.
Medical stabilisation
Aggressive fluid resuscitation, gastric decompression, pain management, and treatment of cardiac arrhythmias form the initial stabilisation phase before surgery. This phase aims to improve cardiovascular function, correct acid-base and electrolyte imbalances, and optimise the patient for anaesthesia.
Trade-offs: Stabilisation improves surgical outcomes but must be balanced against the time-sensitivity of the condition: prolonged delays in surgical intervention allow continued ischaemic damage to the stomach wall. The length of stabilisation before surgery is a clinical judgement balancing improved cardiovascular status against ongoing gastric compromise.
Feeding management considerations
For dogs at risk of GDV or recovering from GDV, feeding strategies such as multiple smaller meals, avoiding rapid eating (using slow-feed bowls or puzzle feeders), restricting vigorous exercise around mealtimes, and feeding from floor level may be discussed as part of long-term management.
Trade-offs: Evidence for specific dietary risk factors is mixed, and not all proposed risk-reduction strategies have strong evidence supporting their effectiveness. However, these management adjustments carry minimal risk and may contribute to reducing gastric distension events.
Common misconceptions
"Only Great Danes and other giant breeds get GDV"
While giant and large breeds with deep, narrow chests are at highest risk, GDV has been documented in medium-sized and occasionally smaller breeds as well. Breeds such as Weimaraners, Saint Bernards, Irish and Gordon Setters, Standard Poodles, Basset Hounds and German Shepherds are among those recognised as having elevated risk, alongside the Great Dane, and UK data also highlight the Akita and Dogue de Bordeaux. Breed and body conformation, particularly a deep, narrow chest, carry much of the risk, and individual factors such as age, temperament and eating habits add to it.
"Elevated food bowls prevent GDV"
Early recommendations to feed from elevated bowls to reduce the risk of GDV have not been supported by subsequent research. Some studies have actually suggested an association between elevated feeding and increased GDV risk in large breeds. The relationship between feeding height and GDV risk remains unclear, and the simplistic recommendation to raise food bowls has been largely abandoned by veterinary consensus.
"GDV is just the stomach filling with gas and will resolve on its own"
While simple gastric dilatation (the stomach filling with gas without rotation) may sometimes resolve with medical management, GDV involves rotation of the stomach that creates a mechanical obstruction requiring surgical correction. The volvulus component is not expected to correct itself and produces progressive vascular compromise that, without intervention, leads to gastric necrosis, cardiovascular collapse, and death. Simple dilatation can progress to volvulus, and the two cannot be told apart without radiographs; a dog with a gas-filled stomach looks the same from the outside whether or not the stomach has twisted.
Related conditions
Foreign Body Ingestion
Foreign body ingestion can occasionally lead to gastric distension and outflow obstruction that may mimic some features of gastric dilatation-volvulus, particularly if the object interferes with the stomach's ability to empty. Both conditions may present with retching, abdominal discomfort, and bloating, though the underlying cause and typical progression differ.
Bloat Without Torsion
Bloat without torsion (simple gastric dilatation) is the gas-filled stage that can precede volvulus, and at home the two look the same: a distended abdomen, retching and restlessness occur in both. They are told apart on radiographs, and simple dilatation can progress to volvulus.
Splenic Mass
A bleeding splenic mass, most often haemangiosarcoma in older medium and large breed dogs, can cause a swollen abdomen, pale gums, weakness and collapse that overlap with later-stage GDV. Non-productive retching points more towards GDV, but internal bleeding and a twisted stomach are separated by examination and imaging, and the spleen itself can be twisted or damaged during GDV.
Gastric Ulceration
Loss of blood supply to the stomach wall during GDV can damage its lining, and gastric ulceration can develop during the episode or after surgical correction.
Acute Pancreatitis
Acute pancreatitis can cause abdominal pain, a hunched or prayer posture and repeated vomiting that overlap with early GDV. Pancreatitis more often produces vomiting that brings material up, whereas GDV typically produces retching that brings nothing up, but imaging is needed to separate the two.
The page on this condition is being checked again and is offline for now.
In a large or deep-chested dog, repeated retching that brings nothing up, particularly alongside restlessness, drooling or a tight abdomen, is the pattern most associated with GDV. Nothing that can be seen or felt at home shows whether the stomach has twisted or how much of its wall has lost its blood supply; that distinction rests on examination and radiographs. Abdominal swelling may be slight early on, so its absence does not rule the condition out. Time from the first signs to treatment is linked to survival, and a dog's condition can change substantially within a few hours. Understanding the risk profile of individual dogs based on breed, body conformation, and temperament can help owners recognise the signs of GDV more quickly. A deep, narrow chest, rapid eating, a fearful or anxious temperament and increasing age are all associated with higher risk. For high-risk breeds, prophylactic gastropexy is a preventive option that some veterinary surgeons offer, often at the time of neutering.
Last reviewed: 9 October 2026 · Dr Alastair Greenway MRCVS