My 3 and a half old bf baby will not take formula milk. I have tried all of the 'top' brands and tried giving the milk at all tempretures, but he just wont take it. I have the teats that are supposed to match the breast. I have tried to see if it is the teats or the milk that he does not like and it seems to be the milk, he just cries and cries if given formula. I gave the teat and he was happy to suck on it like he does his dummy but as soon as i put in the milk, wont take teat/suck! He had two or three formula bottles when in hospital and had expressed milk when newborn but caused him not to take breast properly so stopped, but want to reintroduce now. Help any ideas???