My son is now 4 and when he was born he weighed 6lbs and by the time that we left the hospital he was down to 5.5lbs It has been a ongoing process to get him to gain weight ever since. He now weighs about 28 pounds he is real tiny too. His sister is 3 and she weighs more than him and is taller than him so it is kinda bothering him. But we have had feeding tube put in to help him grow and that did nothing. I can remeber that when he was 1 he coudl still wear 6-9 months clothes and i am not lying. He could wear premie outfits and they would be to big for him. I was so worried that he would not grow. But as they say GOD gives us things in different packages. I think that is the saying? Well, I wish you luck in hoping that your baby grows!! I will keep you in my prayers Misty