8 Month Old Still Not Sleeping

Anyone else's 8M old still not sleeping? He wakes up at 4am hungry still. Guzzles a bottle. He eats 20oz formula a day plus 2 jars of baby food and 6 Oz before bed. He's 20lbs and has always been a big eater so I feel bad making him cry it out if he's hungry. Any ideas? I need some sleep:-/