Yesterday talking to my mom, she said to go ahead and up Oz's bottle per feeding. I uppped it to what he seemed to be happy with which was 4.5oz. It worked like a charm yesterday and the first part of this morning. He was going down happily for naps, it seemed like it was the fix.
After the circus with the copperhead in my garage (see next entry), I noticed Oz was spitting up more and not sleeping well this afternoon. Well he actually refused the rest of his bottle this evening, threw up on my husband and has been cranky, crying ever since. So I guess upping his food wasn't the right thing to do and now he's got an upset tummy to deal with this evening and night. *SIGH*