MEOW!

For some unknown reason, my cat loves to wake me up at around 4 in the morning. It sounds like a baby crying. Maybe it is due to the fact that he is 20 lbs and all he wants to do is eat. I don't know, it is starting to drive me crazy. Usually after I can't take it anymore, I'll go give him more food. Then about 5 minutes after that he makes out another really interesting sound. Do you think something might actually be wrong with him?