My twins have always been grumpy wee things, mainly due to suspected cows milk protein intolerance. They have been getting a little better but now every night between 5.30 and 8/8.30 bedtime ( after their feed) is a horror show of screaming. It is proper blood curdling stuff, often accompanied by their special noxious farts. They cry themselves into an exhausted frenzy, fall asleep then come back for another bout in a few minutes. We just can't wait to put them to bed for the night. Is this what is referred to as colic? Do they need an earlier bedtime and this is over tiredness? Once they are down they are not too bad.