LO has been suffering from painful gas and I suspect that the culprit is the formula we have been using to supplement. DH gives him formula mixed with pumped milk at night and it seems like late night/early morning is when his gas is the worst.

Right now, I am not producing enough when I pump to build a stash and supplement when I go back to work. Will he gain a tolerance for formula once his digestive system matures a bit (he is only 3 weeks)? Or once an intolerance, always an intolerance?