I just went back to work and my LO is home with my MIL and is now getting two-three bottles while I am away. I have left her approx. 15-17oz in the fridge for each day. We have followed the normal range of ounces per bottle found on Kellymom.com (1-1 1/2 oz per hour). He is currently 20 lbs at 4 months old (he was born 9 lbs 7 oz). He is currently getting 4oz in each bottle and is fed on demand (hence the 2-3 feedings a day). However, after each bottle is finished he freaks out crying...he does get over it but is fussy. Am I feeding him enough? I have read to let the baby determine when he is done, but it is normally in the context of not overfeeding and forcing him to finish the bottle. My LO doesn't have that issue...its more of a he wants more fussy? or is it something else? Any thoughts or experiences with other moms out there with this?