Leviticus: God's diet

Leviticus occasionally uses the phrase "food of your God." Perhaps it is only saying "food that is offered in sacrifice to God" and should simply be taken at face value. Yet, maybe there is another way of understanding it.

If the sacrifices given to God were considered his food, then shouldn't we raise the question about what we are sacrificing to him today? If food keeps us alive, then what am I doing to keep my God alive? I'm not implying that his existence depends upon me. I am implying that the relationship between us thrives or withers based upon my attentiveness. He can be alive or dead "to me" based upon my involvement in the relationship.

Do I offer a constant, reliable diet of sacrifice to my Father that nourishes the relationship? Do I provide a care and attention to the relationship by sacrificing important things like time and energy? Or does my God just get leftovers? When there is a spare moment or convenient time, I give a little of it to him. Is that enough for a healthy relationship to grow? If that is how I treat other relationships, what would happen to them?