I agree with the others that say that he is not waking up out of hunger and that he is waking up to get a response out of you, unless he is teething or having stomach pains or something. I don't know how your son goes to sleep, but I am not a big fan of the cry it out method. I believe that for most children, there are other ways of teaching them to self-soothe that are not so painful for them or you. I sleep-trained my son at 4 months and am in the process of doing it with my 2 month old daughter now, and I have never let them cry it out. I hold them, soothe them, or nurse them, whatever they need to settle down, but do not allow them to fall asleep. Once they are drowsy and close to sleep, I put them in bed and either rub them or talk to them or sing to them to settle them. If they are really upset, I pick them up and start again, but eventually when they fall asleep, they do it in their bed. After a few nights, I can just settle them quickly, put them in bed, and they will go to sleep without me there. I will let them cry for 5 minutes or so, but not just leave them to cry endlessly. I would recommend doing this at bedtime, and then doing it when he wakes up at night, and not feeding him. At his age, he does not need to eat in the middle of the night. My son always went to sleep with music and my daughter responds really well to white noise. Good luck and hopefully this helps and you find a way that works for you!