He did have a rather nasty bout of
rotavirus and lost an awful lot of weight through that, but
did not have to be hospitalized.
My concern is this. He is now about to be 2. He has not yet caught up to normal. He has increased percentiles, but only to about the 8th. I know that most low birth weight babies do catch up, but read that it is usually by the time they are two. He is still small. 32 inches tall, and about 24 lbs.