Ascites was a concern I had for a moment, as from a heart problem. A pendulous abdomen, internally, which occurs often in Cushings, is more a breakdown of the abdominal muscles than fluid. FIP causes a sudden buildup of abdominal fluid, completely different than ascites. But the duality of the tissue, her attitude, and your description of her normal behavior, made me 'see' my cats.
The medicine I was thinking of, cyclosporine, is tablet. Maybe your vet is being as easy on you as possible. One of the tremendous advantages of first hand treatment, not long distance.
Don't encourage her cleaning her plate. Slowly, and in small increments, say weekly, try to reduce her food intake. It is a sort of uphill battle with her meds, but just try, or she will continue to gain. Don't be dictatorial, just try.
Inflammatory bowel disorders often have an internal root cause that may ameliorate with treatment, but refuses to completely disappear.
Best wishes, and do not check the green box...again!
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Please check just one ACCEPT box. Feedback is nice, too. Medicine comes in doses of Science, Art, and Miracle, given as needed.
