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I'm sorry you have had such a long wait to get a response to your question. I just logged on and saw your question and have replied immediately.
I would like to help you and your dog, Toby, with this question, but need a bit more information in order to better assist you.
If he is feeling unwell at the moment, there are some things you can do at home:
1. WITH-HOLD FOOD for 12 hours since he has been vomiting today. This gives the intestines a chance to rest and heal.
2. When he is fasting, he can have lots of clear fluids.
DO NOT START THESE UNTIL IT HAS BEEN 4 HOURS SINCE HE LAST VOMITED!
So, water is fine, but also he can have pedialyte, Gatorade, apple juice diluted 50:50 with water, or onion- free chicken or beef broth diluted 50:50 with water.
Give the fluids in small amounts frequently.
For a dog this size that means about 1/2 cup an hour.
3. After 12 hours, you can start your dog back on a bland diet.
For patients that I see, I recommend a mixture of 75% cooked white rice, and 25% low fat protein. For the protein you could use extra lean ground beef, boiled with the fat scooped off, or chicken breast boiled with fat scooped off or even scrambled egg cooked without fat in the microwave. Feed small frequent meals. For a dog this size, I would suggest 2 or 3 tablespoons every 3 to 4 hours.
4. After 1-2 days on the rice mix, you would gradually change Toby back to the normal dog food.
So, on day 3, give the rice mixture, but bigger meals, spaced further apart. On day 4, mix a little tiny bit of the normal food in there, and decrease the frequency so it is down to 3 meals or so. And so on.
5. Keep your dog as quiet as possible - just out to relieve himself and back in.
If Toby continues to vomit, develops blood in the stool, is lethargic or shows signs of abdominal pain, please contact a veterinarian promptly. Good luck with your boy!
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The above is given for information only. Although I am a licensed veterinarian, I cannot legally prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet I would strongly advise contacting your regular veterinarian.