So my son is 6 months old. I want to start transition to strictly bottle. Before I would switch breastfreeding to bottle(pumped) and would take the bottle as long as it was breast milk. Once he turned 4 months he would not take it and refused to take the bottle , eeven with freshly pumped breast milk. Idk what to do his bottom teeth are coming in and he tends to chomp down. 😭 please help.the bottle he's using are mam ... Maybe jtd the bottle nipple. What bottles are best for transitioning ???