So normally with acute vomiting we do recommend withholding food and water initially because anything going in orally could just further irritate the stomach and come back up causing further dehydration! We normally recommend nothing orally (no food, no water, no going outside and eating grass) for a period of 6 to 8 hours. If 6 to 8 hours go past with no vomiting then slow reintroduction of fluids is advised, usually 1tsp per pound of weight every few hours. If a dog can drink this amount several times without vomiting, then reintroduction of small amounts of highly digestible food (i.e. plain cooked rice and boiled chicken breast are appropriate for this!) every few hours can be started. If a dog does well with this, the digestible diet can be continued for several days. If your dog has gone since yesterday you don't have to do this fasting and can just start with the rice and chicken.
If despite fasting a dog continues vomiting, if after reintroduction of water or food vomiting returns, if weakness/lethargy develops, if abdominal pain develops, if trouble breathing develops, or if the gums appear pale, these are all reasons that a veterinary exam should be pursued ASAP. I am attaching a link here with information on treatment of vomiting:http://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=353
Unfortunately, it is tough to treat vomiting at home because we cannot give oral medications while they are vomiting! Most often, an injection of antivomiting medication is needed (and sometimes fluids under the skin for rehydration), and then once vomiting is controlled, a switch to oral medications can be performed.
***Please be aware that the information we discuss is only general information about animal health that may relate to your pet’s concerns. The only way to determine the true cause of your pet’s concerns is an in-person exam with your veterinarian, and this online service cannot replace a veterinary exam.***