Ds is 21wks & for the last week has been off his milk a bit. he was previously in a good 4 hrly routine but then started only taking 2-3oz so i reverted back to 3 hrly. this is working better & he'll now take 4-5oz each feed but if i break him off he won't take the bottle back. for example this morning he only took 3oz then filled his nappy so broke himself off & refused to take the bottle back. he then took a whole bowl of fruit cereal so he was obviously still hungry. does any1 else have experience of this, any suggestions??