Hi there Therese M
I think you are right, her poor appetite is likely due to the antibiotic she is on and overall just not feeling well. Reach out to the vet and ask that he/she prescribe a calorie supplement. Its a dark brownish paste that can be prescribed to underweight dogs. Try mixing it with peanut butter, liver Kong treat paste or spreading it on some pepperoni, anything she might tolerate eating. The supplement will help with her calorie deficit while (hopefully) her appetite gradually improves.
As far as food, stick to what you know she will eat – Cesar trays, pepperoni and peanut butter. I know it isn’t ideal; do what you can. If her appetite does not increase within 2 days of completing the antibiotic round call the vet.
Its easier said than done, but be patient and don’t stress yourself out further trying to find different foods for her right now. When you do start your search for a dog food, buy the smallest bag possible and ask for any samples or trial sizes the store may have of other foods.
While Susan brings up a good point about potential stomach or pancreas issues, focus on resolving the most immediate issues you are aware of – finishing antibiotic routine, increasing appetite. If her issues eating persist after the antibiotic is done, then explore other more invasive options.
Best of luck!
