After a single vomiting episode, withhold food for 24 hours to let your dog’s stomach settle. Water should also be limited for the first 24 hours, then reintroduced slowly before food. This timeline applies to otherwise healthy adult dogs. Puppies, toy breeds, and dogs showing additional symptoms need a different approach.
The 24-Hour Fasting Window
For a straightforward case of vomiting, the standard veterinary recommendation is to withhold both food and water for 24 hours. This gives the stomach and intestinal lining time to recover without being triggered again by incoming food. Most dogs handle this fasting period without any problems.
After those first 24 hours, reintroduce water before food. Start with ice cubes rather than a full bowl. If your dog keeps the ice down, gradually increase the amount of water offered throughout the day. Only once water is staying down should you move on to food.
Puppies and Small Breeds Can’t Wait 24 Hours
The 24-hour fasting rule does not apply to puppies, neonates, or toy and miniature breeds. These dogs have very limited energy reserves and a reduced ability to maintain their blood sugar during a fast. A young puppy can develop dangerously low blood sugar within two to three hours of not eating. Toy breed adults face a similar risk because of their low body mass.
If your puppy or small breed dog is vomiting, contact your vet rather than attempting a long fast at home. They may recommend a much shorter fasting window or an alternative approach to keep blood sugar stable while the stomach recovers.
What to Feed First: The Bland Diet
When it’s time to reintroduce food, skip the regular kibble. Start with a bland diet of boiled chicken breast mixed with plain cooked white rice. Use breast meat specifically, since thigh meat contains roughly twice the fat and can irritate a sensitive stomach. No seasoning, no butter, no oil.
Offer small portions rather than a full meal. Think a few tablespoons at a time for a medium-sized dog, spread across four to six mini-meals throughout the day. The goal is to test whether the stomach can handle food again without overloading it. If your dog keeps the first small portion down for an hour or two, offer another small serving.
Some dogs have chicken allergies, which are becoming increasingly common. If your dog has a known sensitivity, or if the bland diet seems to make things worse, a novel protein your dog hasn’t eaten before (like duck or rabbit) can work as a substitute. Your vet can also recommend a hydrolyzed diet, where the proteins are broken down small enough that they’re unlikely to trigger a reaction.
Transitioning Back to Regular Food
Once your dog has kept the bland diet down for a couple of days, don’t jump straight back to normal food. A sudden switch can upset the stomach all over again. Instead, transition gradually over about one week using this schedule:
- Days 1-2: 75% bland diet, 25% regular food
- Days 3-4: 50% bland diet, 50% regular food
- Days 5-6: 25% bland diet, 75% regular food
- Day 7: 100% regular food
At each stage, check that your dog’s stools remain firm before increasing the proportion of regular food. If stools become loose or vomiting returns at any step, drop back to the previous ratio for another two days. Some dogs need longer than a week to fully transition. Hold off on treats for at least a week after your dog is back on 100% regular food.
Signs That Vomiting Needs Emergency Care
A single episode of vomiting in an otherwise bright, active adult dog is usually manageable at home. But certain patterns signal something more serious. Contact your vet or an emergency animal hospital if your dog:
- Vomits more than once in 24 hours
- Has blood in the vomit or stool
- Seems weak, unusually tired, or collapses
- Has a swollen or painful belly
- Refuses both food and water entirely
- May have gotten into trash, medications, or toxic foods (chocolate, xylitol, grapes)
Forceful or repeated vomiting paired with abdominal pain can indicate a blockage or bloat, both of which are life-threatening. Small breeds and puppies dehydrate rapidly, so even two episodes in a row warrant a call to your vet rather than waiting out the full 24 hours at home.
Probiotics During Recovery
Adding a probiotic supplement during and after the bland diet phase can help restore the balance of beneficial bacteria in your dog’s gut. Products like FortiFlora or Proviable are commonly used for this purpose. These supplements support digestion and can speed recovery from stomach upset. Ask your vet whether a probiotic makes sense for your dog’s situation, especially if vomiting was accompanied by diarrhea.