hmmmmm how old is he, how many bottles does he have a day? could it be that he is ready to drop out a bottle?

with my dd she is often not hungry or not wanting her bottle when i think she 'should' want it, and sometimes i am trying to feed her and she won't have a bar of it, so lately i ignore the clock pretty much and just go by her hunger cues... has made a HUGE difference at meal times as she is actually wanting the food instead of me thinking oh, 12pm time for lunch, IYKWIM.

sorry this probably doesn't help... i just know that with my dd she often had more hungry days and less hungry days, just like we do..... she certainly wasn't a routine feeder, or sleeper for that matter!!

good luck hope he picks up soon xx