When to feed?

Can someone help me find the guidelines re: when it's suggested that you feed? Gizzy has a definite pattern going on with his #'s and I wonder if it's food related?? I dose him at 8:30am and 8:30pm. He has always been fed at 3am...so I typically feed at 3am, 8:30am, 3pm and 8:30pm. I'm wondering if the feeding at +6.5 is screwing him up? I'm going to curve him on Wed - I feel like I almost have to do a 24hr curve to really figure it out since his am and pm #'s are so different! I'm baffled by the pattern I'm seeing! Help!! :YMSIGH: