J.C.
comfort him when he wakes, but wait 5 minutes to go to him if he is only fussing or light crying and see what he will do on his own. If 5 minutes goes by and he is not settled, or if he is really crying, go in and comfort, but without food. Sing to him, rub his tummy, ect, but try to keep him in his crib and laying down while you comfort. It may make for a long couple of nights, but he will get it. If need be have sister spend 2 or 3 nights on the couch while you teach your son how to sleep without food as a pacifier.