my son was terribly colicy and it was an absolute nightmare to tell the truth at the start.
he use to poo constantly like little wet farts every half an hour! and it was BRIGHT yellow with little grainy bits! We put him on comfort milk at about 8 weeks and i saw a massive change in him within a week. He went from pooing nearly ever half an hour to once a day (although comfort milk makes their poo absolutely gross and green!
) and he had a little "colic episode" maybe once a day usually in the afternoon but all in all i saw a huge improvment, including only waking once in the night for a feed 8)