Congratulations on Your grandson, and dont be to worried, it seems when they are born smaller, they do very well now a days. I should know, I had triplets and when they were born they weighed in at 3.12, 3.14, and 4.11 lbs. Although they are scary to hold because they are so tiny, they are very sturdy. It is amazing to see, all of mine are in great health and had to spend minimal time in the hospital, actully he already has part of it down, usually they have to be 4 lbs to go home. So as long as he is a health little guy he should be home soon. Good luck and congratulations, good things almost always come in small packages.