hi. I am mother of 3 months 9days old twins baby. on 15th day I introduced nipple bottle feeding and my babies always do shallow latch I can always hear a clicking sound while feeding also sometimes milk flow outside their mouth. and I feed them formula too. they doesn't learn to latch properly. Is it possible to teach latching now I tried different positions but no use. please suggest me a position to make them have a deep latch. also they have severe gas problem.