My 16 week old daughter just doesn't drink much. During the day she will have 1 to 2 or sometimes a miracle 3 Oz every 4 hours (occasionally a slurp more at 2 hours but only if I sneak up on her) but only when she is ready. If I try to feed her before she is ready she flatly refuses. Then once her tiny appetite is satisfied it's quite clear she doesn't want any more. Lips tightly shut, blowing mouth fulls of milk everywhere or yelling for me to STOP. I have given up trying to shovel more in as I don't want feeding time to become traumatic for us. She is easier to feed at night with 3 or sometimes a miracle 4 Oz going in. I am still up 2 or 3 times at night. Total daily feed can be less than 20 Oz. She is otherwise smiley and healthy looking but sleeps lots. Does anybody have similar issue and can put my mind at rest.