To try and settle her stomach and decrease acid production, which will only lead to further irritation, you can try either:
1) Pepcid-ac (famotidine) at a dose of one half of a 10mg tablet per 10 to 20 pounds of body weight every 12 hours.
2) Prilosec (omeprazole) at a dose of one quarter of a 20mg tablet per 10 to 20 pounds of body weight every 24 hours.
These will reduce stomach acid and should help settle her stomach. These should be given for several days to decrease chances of permanent burns and damage to her esophageal and stomach lining.
Then feed a homemade diet of 1/3 boiled hamburger or white, skinless chicken, all fats and juices drained and 2/3 white rice. Add 1 to 2 tablespoons of canned pumpkin, (not pie filling, just pumpkin), to each meal for fiber if she has any mucousy diarrhea. Feed small meals several times a day.
Once she's feeling better then start mixing in her regular food, adding a little more regular and less bland at each meal. It should take a week to get her converted back to regular food.
If she is vomiting, even after the acid reducing medication is given, refuses to eat or has explosive diarrhea it is best she see a veterinarian for an examination, injectable medications and oral medication like sucralfate to coat her gastrointestinal system.
But if she shows no symptoms there is no need for you to do anything further than the recommendations I gave you.
Let me know if you have any questions