It has to be a hollow leg.

That's the only explanation for why Atticus is eating all the time. He doesn't really want to sleep during the day and that means he's eating every 3 hours and taking a lot of food either in the bottle or via spoon. He's also wanting to stay up a long time during the day. Today I had him up for almost 2 1/2 hours and he was just starting to get cranky. None of the other two have been like that. He just rolls around on the floor and grabs things, chews on them and grabs something else. He's also into making a lot of noise. At first I thought he was cranky but that's just him talking away. It really is true that each and every baby is different!