I don't understand what is going on in this scenario.
First, there isn't a snack time before bed in our household. Usually it's dinner, tidy, PJs, potty and wash hands, face, and teeth, then stories and bed time. Simple simon.
Second, if DS is feeling hungry at bed time, he gets a banana. If he's not hungry, he usually goes right to sleep.
Who knows. I don't' get it.