My dd didn't laugh until around 4.5 months. I think 14 weeks may be a bit on the early side for laughing, and babbling. I wouldn't worry too much about the milestones though as I found dd would be faster at some and slower at others. If your LO was a preemie - that would affect the rate of achieving milestones. I don't think feeding issues would have an impact. The Baby Book by Dr. Sears had a good chart on developmental achievements at different months.
9/15/09 at 4:59am