okay teens, I go to your websites because I have a son that just turned 6 years old he was diagnosed w/ cf at 18 months, in which he was sick the entire 18 months. They tested him for cf when they could not test him for anything else. they were shocked because of such good weight!! He is now like I said 6 and weighs in at 91lbs. He eats like a horse is not on enzymes, (please do not get me wrong he stays sick) his biggest problem is constipation, blockages. We have to constantly stay on top of the problem. Its strange, I know his body is not breaking the food down but yet his weight is good. I listen to you teens because I get better knowledge. Is any body out there have this problem???? It worry's me because mostly cf causes loose not hard. Any imput were be greatly appreciated.