My son is 7 1/2 months and is not a big fan of solids. He shows a lot of interest when I eat but when I offer him food he usually makes puky faces and blows the food out of his mouth. He is gaining weight very well. He's 29 inches long and 21lbs. He's tripled his birth weight. Should I be worrying about his lack of interest in solids or is it alright as long as he's gaining weight well? I find that he eats quite a bit and is getting so big that it's very exhausting to breastfeed him. I plan on breast feeding him for quite a while but I'm hoping I can substitute once in a while (even rarely) with food. Any advise?