Welcome to Justanswer! I am Dr. Altman and happy to assist you both today!
I have seen this happen on a few occasions when the stomach fills with air or a dog ingests something such as a bug or spider and causes a reaction. I can give you some basic guidelines but if this is not improving or progressing again then please consider a veterinary er tonight, especially if you note her abdomen is swollen at all or she begins to be restless with the retching...
1- Keep indoors to avoid eating grass/ leaves for 6-8 hours from last vomiting/ retching episode and no water even to allow the stomach to rest and spasms to subside
2- Offer a small amount of water (1-2 teaspoons hourly) for a few hours
3- Start Pepcid (famotidine) 10mg 1 tablet every 12 hours OR prilosec (omeprazole) 20 mg 1 tablet daily for the next 3 days with the second administration of water (crushed if needed)
4- Also begin benadryl at 1 mg/ pound every 8 hours which may sedate but if this is an allergic reaction will help get these episodes to subside. If she is resting you can try crushing this up first after about an hour after they resolve but please be cautious because it can cause the episodes to recur again as well
5-If no vomiting, offer small amount of white rice and boiled boneless or ground chicken or ground beef. For example, one tablespoon hourly for a few hours then slowly start to increase the amount while reducing the frequency. Keep on this diet for several days then wean into regular diet.
6- If vomiting continues after doing the above, I would encourage having your family veterinarian perform an examination to determine the next step to getting her comfortable and what exactly the underlying cause is.
Indications your dog should be seen by a veterinary er sooner include: sticky gums that are pale, yellow, blue, purple, temperature rectally >103.5, progressive lethargy with less responsiveness to you, vomiting or diarrhea that includes blood, resting respiratory rate (breaths per minute) >60, swollen abdomen.
I hope this makes sense but please let me know how else I can assist you both this evening
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