Dry heaving in dogs is usually caused by something minor like throat irritation, nausea, or kennel cough, but it can also be the first sign of a life-threatening emergency called bloat. The most important thing you can do when your dog starts dry heaving is figure out which category you’re dealing with, because that determines whether you have minutes to act or days to manage it at home.
Rule Out Bloat First
Bloat, formally called gastric dilatation-volvulus (GDV), happens when a dog’s stomach fills with gas and twists on itself. The signature symptom is non-productive retching: your dog looks like it’s trying to vomit but nothing comes up. Without treatment, bloat can kill a dog within hours. Mortality rates range from 10% to 33% even with veterinary care, so speed matters enormously.
Check for these signs alongside the dry heaving:
- Swollen or tight abdomen that may feel hard to the touch
- Excessive drooling beyond what’s normal for your dog
- Restlessness or pacing, unable to get comfortable
- Pale gums instead of their normal pink color
- Weakness or collapse
- “Praying” position, with front legs stretched forward and chest low to the ground
If your dog is dry heaving and shows even one of these additional signs, go to an emergency vet immediately. Don’t wait to see if it passes. Large, deep-chested breeds like Great Danes, German Shepherds, and Standard Poodles are most at risk, but any dog can bloat.
Check for Something Stuck in the Throat
A partial throat obstruction from a bone fragment, piece of toy, or chunk of food can cause repeated gagging and dry heaving as your dog tries to force the object out. If your dog is pawing at its mouth, making exaggerated swallowing motions, or seems panicked, choking is likely.
The Red Cross recommends opening your dog’s mouth and gently pulling the tongue forward, then using a careful sweeping motion with your finger to try to dislodge the object. Be cautious not to push it deeper or get bitten. If that doesn’t work, give five sharp blows with the palm of your hand between the shoulder blades. For a dog you can lift, you can also perform abdominal thrusts: stand behind the dog with its spine against your chest, wrap your arms under the rib cage, make a fist, and give five quick inward-and-upward compressions. For a large dog that’s too heavy to lift, lay it on its side and apply the thrusts below the rib cage, or lift just the hind legs so the head hangs down.
Even if you successfully remove the object, a vet visit is still a good idea. Choking can cause swelling or fluid buildup in the lungs that isn’t immediately obvious.
Common Non-Emergency Causes
If your dog is dry heaving occasionally but otherwise acting normal (eating, drinking, playful, no abdominal swelling), the cause is likely something less urgent.
Kennel cough is one of the most frequent culprits. It’s a highly contagious respiratory infection that produces a distinctive honking cough, which often ends in a gag or retch. Dogs pick it up at boarding facilities, dog parks, or anywhere they’re in close contact with other dogs. It typically resolves with rest, though some cases need a course of antibiotics or anti-inflammatory medication from your vet.
Swollen tonsils can trigger repeated gagging and retching, similar to how a sore throat makes you feel like something is stuck. This often accompanies kennel cough or other upper respiratory infections.
Nausea from an empty stomach is another common trigger. Dogs that go long stretches between meals sometimes retch or produce small amounts of yellow bile, especially in the morning. This happens because stomach acid and bile build up with nothing to digest.
Excitement or temporary irritation can also cause a brief episode. If your dog dry heaves once or twice after drinking water too fast, eating grass, or getting overly worked up, and then goes back to normal, it’s probably nothing to worry about.
Settling Your Dog’s Stomach at Home
For mild, non-emergency dry heaving, a brief fast followed by a bland diet is the standard approach. For healthy adult dogs, withhold food for 4 to 12 hours to let the stomach settle. For puppies or small dogs, keep the fasting window shorter, around 4 to 6 hours, since they’re more susceptible to low blood sugar. Make sure water is still available throughout.
Once the fasting period passes with no more retching, reintroduce food slowly. Start with about 10% of your dog’s normal portion size. The meal should be bland: boiled, unseasoned white-meat chicken (no skin or bones) mixed with plain cooked white rice, or very lean ground turkey with boiled mashed potatoes. No seasoning, no butter, no oil. This combination is gentle on the digestive system while still providing calories. Feed these small meals several times a day rather than one large one, and gradually increase portion sizes over two to three days before transitioning back to regular food.
These homemade bland diets aren’t nutritionally complete, so they’re fine for a few days but shouldn’t replace your dog’s normal food long-term.
What Your Vet Can Do
If the dry heaving persists for more than a day, keeps recurring, or comes with other symptoms like lethargy or loss of appetite, your vet will likely start with a physical exam and may take X-rays to check for foreign objects, tumors, or signs of bloat. Anti-nausea medications can help break the cycle of retching. The most commonly prescribed option blocks nausea signals in the brain and is effective at stopping vomiting, though newer alternatives target the serotonin system and may do a better job of relieving the nausea itself, not just the vomiting reflex.
For kennel cough or tonsillitis, treatment is straightforward: anti-inflammatories or antibiotics depending on severity. Most dogs recover within one to two weeks. If a partial throat obstruction is involved but can’t be removed at home, your vet has tools to safely extract it or can use sedation to get a better look.
Preventing Future Episodes
Many cases of dry heaving are preventable with a few adjustments to your dog’s daily routine.
Space out meals and exercise. Vigorous activity on a full stomach is one of the biggest risk factors for bloat. Wait at least a few hours after feeding before any strenuous exercise like running, rough play, or swimming. Some guidelines recommend waiting as long as five hours before intense activity, especially for breeds prone to bloat. The same applies to large water intake: don’t let your dog gulp down a huge amount of water right before or after exercise.
Feed smaller, more frequent meals. Dividing your dog’s daily food into two or three meals rather than one large serving reduces the amount of food sitting in the stomach at any given time. This lowers bloat risk and also helps prevent the bile-related nausea that comes from long gaps between meals. If your dog tends to retch in the early morning on an empty stomach, a small late-evening snack can help.
Slow down fast eaters. Dogs that inhale their food swallow a lot of air in the process, which contributes to stomach distension. Slow-feeder bowls with ridges or raised patterns force your dog to eat around obstacles, naturally slowing the pace.
Keep small objects out of reach. Bones that splinter, pieces of rawhide, small toys, and even sticks can all become partial obstructions. Supervise chewing time and choose toys that are too large for your dog to swallow.