That's perfectly understandable - what one person (of the furry or huan variety) wouldn't mind at all, would be very stressful for another.
At this point, I would just feed her whatever she might enjoy. When my kids have been in the end stages of life, whether because of age or illness, I've made them pizza, mashed potatoes, cookies, and bought them roast beef sandwiches, shrimp, etc. - whatever they will eat. Whether it's "healthy" or not isn't really an issue, since it's a lot less "healthy" not to eat. Also, I've found that what they might find appetizing one day won't appeal to them the next. I've gone through a year or ore of constantly mixing it up, foodwise, for some of my old people.