You could actually try adding a couple of tablespoons of rice cereal to his bottle of milk. This way he's getting the extra "bulk" that he needs to stay fuller longer. Most ped's are going to tell you to not feed a baby anything other than milk from a bottle but I truly believe that whatever works for you is the motto you need to live by. I tell my husband, "the pediatrician gives guidelines, we make the rules". If you want to start feeding him from a spoon I would do rice cereal until he's at least 4 months before you start stage 1 foods.