Both my DDs had dairy, wheat and gluten intolerances - DD1 much more severe than DD2. We saw several paediatricians and ended up seeing a paed who specialises in allergies. Both girls were tested (faeces and blood) and both showed positive to intolerances, with DD1 considered allergic to dairy.

Both my girls screamed 20 odd hours a day, were rigid with stomach pain and had explosive liquid poo two or three times per breastfeed.

They initially had delayed reactions, but it builds up in their systems so by the time we got to say 6 weeks both girls were having immediate reactions where they screamed and pulled off the breast during feeding, and their poos were becoming more immediate.

I tried altering my diet with DD1. I was basically dairy free right from the start and then included a whole heap more foods - got to the point where I had excluded seemingly everything and she was still unsettled and in pain, which is when I switched her to formula.

DD2 now eats yoghurt, cheese, ice cream etc and drinks lots of milk. DD1 won't touch milk or yoghurt at all, and will eat tiny amounts of cheese.