Yes, I use A/D for a reluctant eater, just to get some nutrients on board, especially when the digestive tract is out of balance and the dog needs something easy on the stomach so they don't vomit back up what I just talked them into eating.
Luni was not willing to eat her regular food or canned treat. But she was willing to eat the A/D. After fasting for two days, I needed to get something in her. It did jump start her appetite and she ate her regular kibble for the next meal and thereafter without reluctance.
Today I picked up two packs of chicken and rice, precooked (just warm in microwave) for the next time I need to tempt someone and don't have any frozen chicken breasts on hand. That's what all my dogs consider comfort food when feeling puny: skinless chicken breast and white rice. It's not nutritionally complete, but it will tempt a reluctant eater, gets some basic nutrients on board, and is pretty easy on the system.
I will eat white rice with melted cheese when I feel puny, so I tend to agree it's a good comfort food. Rice and anything starting with "ch." Well, maybe not cherries.....