Since DS1 was born 11 days ago, 2yo DS2 has developed a significant stutter. He can barely seem to get a word out without stuttering. He's adjusted pretty well to DS2, but has definately shown a bit of regression in his behaviour and is a bit out of sorts. He's getting frustrated very easily and throwing lots more tantrums - which I kind of expected, but the stuttering has thrown me a bit! Has anyone else's LO done this after the arrival of a newbie?