Most dog owners have realized that canine vomiting is a pretty common ailment, because many dogs will eat just about anything. The most frequent cause of dog vomiting is the intake of undigestable food, such as grass, food that's gone bad, or something that's not even food like a scrap of paper or a child's sneaker. Another cause would be a dog overeating or eating too quickly. It's also possible your dog has vomited because she's allergic to something she's ingested and the vomiting is an adverse reaction. Be sure to prevent your dog's access to said items. But for now, your dog's body needs to recover.
Let the Digestive System Rest
One of the first necessary approaches to treating acute canine vomiting is to give your dog's digestive system a complete rest. Once active frequent vomiting has stopped, it is important to not feed your dog for 24 hours while making sure to give her small amounts of fresh water to drink. Feeding a dog its normal amounts of food and water will only aggravate the inflammation that's causing the gastrointestinal upset.
Your dog may keep on vomiting at first, until her gastrointestinal system calms down. If your dog tries to drink large amounts of water too fast, give her a couple of ice cubes at a time. Once the vomiting has stopped, offer a small dog (such as a terrier) one teaspoon of water at a time, at frequent intervals (about every fifteen or twenty minutes). For a larger dog, such as a Labrador, offer twice that much.
Maintain Blood Sugar Levels
While the dog is fasting, she is at risk for hypoglycemia. To maintain your dog's stable blood sugar levels, rub about a teaspoon of honey or maple syrup into the gums of a small dog every six hours. Rub up to three teaspoons of honey or maple syrup onto a large breed dog's gums.
After 24 hours, introduce small portions of very bland food into her diet. A good option is some boiled, skinless, boneless chicken mixed with plain boiled rice or plain nonfat boiled hamburger meat with cottage cheese. Feed your dog several bite-sized portions of this instead of a large meal. The portion size should be the equivalent of a couple of teaspoons.
Gradually Introduce Normal Diet
After a day of feeding these small portions of bland food to your dog, if the vomiting has stopped, you may begin to mix the bland food half and half with your dog's regular dog food.
Over the course of the next few days, you can introduce a little more of the dog's normal food with the bland diet, until she has gradually, over another few days, resumed her normal food regimen. It's extremely important to gradually introduce your dog's normal diet, because doing so suddenly could trigger a relapse.