I believe the RC LF-20 is the most fat restricted diet on the market. Maybe the ultra low-fat works really well for her. Since Pork and Chicken was a trigger for us, the only other option for an ultra low-fat diet was the formulated one with Fish. If this is working your vet is wise.
http://web.archive.org/web/20100727135638/http://www.royalcanin.us/adx/aspx/adxGetMedia.aspx?DocID=134,293,12,1,Documents&MediaID=5953&Filename=Canine+Gastrointestinal+Low+Fat+LF.pdf
We had a diagnosis of Helicobacter, and gastritis when we did the scoping. His stomach was noticeably raw with lesions. Back then we did the amoxicillin and metronidazole, and it went away. Because the gastritis was part of the auto-immune, eosinophilic problem finding the right novel protein diet was important for us.
Later he had tested for a tick disease, and needed to be on Doxycycline. This was before he was stabilized on the diet. To get him through the harsh antibiotic we used Sulcrafate, and an acid-reducer. I had to time things very closely, and feed a slurry of some broth and boiled potato every hour to keep his stomach full. I think it was Pepcid, then 1/2 hour later Sulcrafate. He got a cup of the potato slurry, then the Doxycycline an hour after the Sulcrafate. Something like that I repeated three times a day. It is possible if you can get your vet to make up a schedule, and you have lots of timers to set:-)
It looks like the RC low-fat has corn grits as a carb. Maybe you can use small amounts of grits to keep his stomach full between regular feedings. That’s a question for your treating vet to answer about adding stuff. Do you have somebody at home to help? It is great if you can get out.
