My breeder suggested using toppers - a few shreds of chicken or beef from last night’s dinner, a spoon of cottage cheese or yogurt etc. on the kibble. Keeps it interesting instead of same old, same old. I left my Spoo’s food, down and he would graze until it was empty. I fretted like you are doing, until someone on PF reminded me that no dog, even a picky poodle, is not going to starve when there is food available.