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Symptoms and Treatment of Dog Bloat (GDV)

Summary:

"Dog bloat (GDV, food bloat or gastric dilation-volvulus) refers to a condition where a dog's stomach bloats and can twist. A normal stomach should be contracting and releasing food. A dog with bloat takes in excess air or food, causing the stomach to be distended. It cuts off the blood supply and keeps the food and air from exiting.  It is a life threatening disorder with fatalities ranging from 10% to 60%. The disease primarily occurs in large deep-chested dogs between the age of 2 to 10 years. No one knows what causes the condition.  It frequently occurs several hours after a large evening meal with symptoms occuring around midnight.

Signs of GDV (dog bloat) are:

  • abdominal pain
  • distension
  • weakness
  • collapse
  • depression
  • nausea
  • salivation
  • increased heart-rate
  • vomiting
  • retching
  • blue color to tongue or gums

Risk factors for bloat include being a large breed dog (highest percentage of dogs) that is deep chested such as a Great Dane (long length chest with small width). Other risk factors are age (over age 7), rigorous exercising after eating or eating too quickly. It is a myth that a elevated dog food bowl will decrease the risk of developing GDV (2015, Cornell Veterinary). In fact, the risk increases with an elevated bowl.  Food bloat refers to bloat without the stomach twist. The twist is referred to as volvulus.

The exact reasons why dogs suffer from bloat are not understood and not all cases are associated with the identified risk factors.

Always contact a veterinarian if you aren't sure or if there is any chance that your dog is suffering from bloat (see second video on page for dog suffering from bloat symptoms). Veterinarian's will work to remove any air or food from the stomach. Surgery is needed if the stomach moves out of its' normal position, such as a twist or volvulus.  Prevention includes having a dog eat slowly and rest after eating a meal (1 to 2 hours).  Free feeding

Video on Dog Bloat



Video describing dog bloat symptoms and Treatment  


Overview

Bloat (gastric dilatation volvulus) is a very serious condition that requires immediate care. It is the condition showcased in the movie Marley and Me. Approximately 50% of dogs with the condition do not survive. Dog bloat is usually seen in middle aged and older dogs. The exact cause of the condition is not completely understood although contributing factors can include (but not always):

  • Ingesting large amounts of water and food
  • Delayed emptying of the gastric system
  • Too much activity after eating

There is no direct genetic predisposition. Risk factors include:

  • Dogs that have a first-order relative that had bloat
  • Large breeds dogs, with an incidence in this population of 6%
  • Dogs over 100 pounds have a 20% higher risk
  • The condition can happen at any age, although middle aged and older dogs have a higher risk.

Dog Bloat Patient


Large, deep chested dogs have breed predilections towards bloat such as Great Danes and German Shepherds

Breeds at higher risk include:

  • Great Danes (highest risk)
  • Saint Bernard
  • Weimaraner
  • Irish Setters
  • Gordon Setters
  • Standard Poodle
  • Bassett Hounds
  • Doberman Pinschers
  • Old English Sheepdog
  • German Shorthaired Pointer
  • Newfoundland
  • German Shepherds
  • Airedale Terrier
  • Alaskan Malamute
  • Chesapeake Bay Retriever
  • Boxer
  • Collie
  • Labrador Retriever
  • English Springer Spaniel
  • Samoyed
Breeds that are at risk, but not as much as above include:
  • Dachshunds
  • Pekingese
  • Sharpei
  • Rottweilers

New research (2015) shows that IT IS NOT TRUE that a lowered food bowl can lead to the swallowing of air (aerophagia) which could lead to GDV. Abnormal tumor or cell growth may also lead to GDV. More research needs to be conducted.

With bloat, the stomach fills with fluid. Gas and fluid continue to build before the stomach rotates. As the stomach enlarges (becomes distended), pressure increases in the abdomen leading to compressed blood vessels in the abdomen. The reduced blood flow can put the dog into hypovolemic shock.  

The disease can be characterized in three stages of dog bloat. The goal of course is to stop the disease before it proceeds to stages II and III.

  • Pre-bloat: Stomach function is normal, but gas accumulates in the stomach and it is not emptying as it should.
  • 'Stage 1: Stomach starts to dilate
  • Stage 2: Blood supply to part of the stomach is cut off and stomach tissue is damaged
  • Stage 3: Spleen and stomach tissue become necrotic (start to die off). Heart failure and shock set in and is irreversible.  Can result in death.

Your emergency veterinary center will drain the stomach and then attempt to reposition the organs. Half of dogs with bloat do not survive making early diagnosis and treatment critical.

Bloat is actually made up with two conditions. The first, called gastric dilation refers to the stomach filling with food, fluid and gas or air. The second part of the condition is called volvulus, which refers to a stomach that rotates. The twisting can range from 180 to 360 degrees in a clockwise direction.  The stomach twist causes part of the stomach, the pylorus to move out of position. This prevents air and fluid from leaving the stomach, through what is called pylorus canal.

The twisting prevents fluids from leaving your dogs body, not just stomach fluids, but the ability to vomit as well. The condition cuts off blood flow to the stomach tat causes cells to start dying. Since the stomach cannot drain, it becomes distended, interfering with circulation in the stomach and the death of cells in the wall of the stomach (called necrosis).

As the stomach starts to fill or become distended, pressure increases. This compresses the abdominal blood vessels such as the portal vein and caudal vena cava. The lack of blood flow results in less blood going to the heart and a condition call hypovolemic shock, where there is less blood circulating in the body. Shock can occur from the low blood pressure and endotoxins that rapidly develop. If the stomach ruptures, a condition call peritonitis can occur, which is an inflammation of the membrane that lines the wall of the abdomen and covers the abdominal organs.

This in turn causes problems throughout the body such as organ death, inflammation and blood clotting (coagulation).

Symptoms of Bloat in Dogs

Video: Bloat Symptoms in Dogs

dog bloat symptoms
Bloat is best known for having a distended abdomen. Sometimes, particularly early, the condition can be hard to detect.

Bloat symptoms include:

  • Salivation (Ptyalism)
  • Retching
  • Attempts to vomit that are not successful
  • Pacing
  • Restlessness
  • Whining
  • Groaning
  • Lethargy
  • Acting uncomfortable
  • Walking with stiff legs
  • Head hanging
  • Anxious behavior
  • Abdominal pain
  • Abdominal distension (may be hidden by the rib cage)
  • Excessive salivation
  • Depression
  • Vomiting

Late symptoms of dog bloat include:

  • Pale tongue
  • Pale gums
  • Rapid heart rate
  • Labored and rapid breathing
  • Weakness
  • Collapse
Several body systems are affected by bloat including the:

  • gastrointestinal (stomach necrosis or cell death due to decreased blood supply)
  • cardiovascular (decrease in blood return to the heart causing organ problems and tissue damage)
  • lymphatic system problems.

Diagnosis:

X-Ray of GDV or Dog Bloat



X-Rays are used to diagnosis the condition. A veterinarian will look for a distended abdomen. It is possible that a distended stomach can be hidden by the rib cage.

Other signs include fast heart rate (tachycardia), rapid breathing (tachypnea), labored breathing (dyspnea), weak pulse, and pale mucus membranes.

The veterinarian will also seek to eliminate other possible causes such as:

  • Septic peritonitis: inflammation of the membrane that lines the inside of the abdomen. It is often caused by a bacterial infection.
  • Intestinal twisting (intestinal volvulus)
  • Sudden gastroenteritis: irritated digestive tract, otherwise known as a stomach flu

Tests include blood and urine. X-rays are used to examine the abdomen.  In some patients spleen torsion (twisting) is also diagnosed.

Dog Bloat X Ray



Treatment:

Treatment is considered an emergency with hospitalization required.

If the dog is suffering from dilation of the stomach (gastric dilation) then a tube is passed through the mouth to empty the stomach (orogastric intubation). The stomach is washed out. The patient cannot drink or eat for 36 hours followed by intravenous fluids. Once symptoms subside, then the dog is allowed to resume a normal diet. In extreme cases an owner may do it themselves using a tube coated with K-Y jelly."

Dog Tube Measurement for Intubation



If a tube cannot be placed through the mouth, a transabdominal needle (percutaneous gastrocenteis) can be attempted. The veterinarian will use a catheter or large needle.

Anti-biotics will be used in cases where an infection has taken hold. In dogs that triggered a heart problem, an anti-arrhythmic may also be required.

Dog Gastric Lavage



Dogs are sedated before inserting the tube that will be used to empty the stomach. Fluids are drained with gravity or with a syringe or suction pump.
Photo Credit:

Surgery is used if the stomach has twisted and all of the organs need to be placed back into their normal position. Surgery is used to correct stomach twisting (volvulus). The surgeon will reposition the spleen and stomach. Partial removal may be required if some cell death has occurred. Suturing the stomach wall to toe abdomen can help to prevent future problems (called a gastropexy). Antibiotics are used to prevent infection associated with surgery.

Dog Bloat Surgery



Patients need to be monitored for lack of blood flow to the cardiovascular system. Fluid therapy is used based on the health of the patient. In some patients premature ventricular contractions (change in heart function) occurs and needs to be monitored. Kidney and liver function will also be checked after surgery.

Dogs will require restricted activity for 2 weeks after treatment. Once the patient has recovered, food can be provided orally.

Dog Gastropexy


Photo of Incisional Dog Gastropexy, Surgery to Tack Stomach to the Body Wall

Cost of Surgery

Emergency dog bloat surgery (gastropexy) will cost between $3,000 to $8,000.  The cost depends on the length of required post-operative care.

Bloat Home Remedy Kit

If your dog lives a distance from a vet, then a home dog bloat emergency kit makes sense. The kit contains instructions and a tube that can be passed through thte mouth into the dog's stomach. The tube will remove air and decompress the stomach until you can get to a Veterinarian.


Dog eating from a bowl designed to Slow Down Eating and Prevent Bloat
Shown:

Prevention:

Approximately 2/3 of dogs will have a reoccurrence of bloat. To prevent a second occurrence, the following steps can be taken:

  • Watch for signs and symptoms, such as any stomach distension
  • Avoid strenuous exercise when the dog’s stomach is full. Wait until 1 hour after eating.
  • Do not allow the drinking of large quantities of water in one sitting
  • Eliminate water drinking 1 hour after and before meals
  • Eliminate foods from the diet with citric acid
  • Do not feed high fat foods (fat is in the first 4 ingredients)
  • Do not use a raised food dish
  • Provide 3 meals a day instead of 1 (each meal is 1/3 the size of 1 meal), slow meal consumption
  • Soak dry food in water prior to feeding the dog
  • If you dog gulps food, slow the rate of eating by buying a dog food bowl that has multiple small compartments, which slows down the dog.
Free feeding can be a preventive if a puppy continues to graze as an adult. Puppys freed fed will usually eat small amounts through the day.  If the dog remains a grazer of food as an adult then the risk of GDV is reduced.

Prophylactic Gastropexy

Prophylactic Gastropexy is a preventive surgery for high-risk dogs. It is a minimally invasive lapraoscopic procedure that can be done when a dog is castrated or spayed. The surgery uses a small incision and costs between $500 to $800 dollars (vs. the cost of emergency gastropexy which costs between $3,000 to $8,000 (depending on the amount of care that is needed after surgery).

Prognosis

Treated dogs that do not have damage to the stomach (necrosis) have a 98% survival rate. Dogs that have gastric necrosis have a 66% survival rate.

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