im new here.... what it is my lb is 14 weeks old and I lactose intolerance..... he was on sma pro and having colief drops.... they where working but now they aint working so he is on sma lactose free hea been on that for 2days now and he hasnt had a poop so im not sure if that milk is working... how long after changing milk does it work.... I thought it would work straight away but ive been told it may take a couple of days for the milk to settle down