Wednesday night I put the bumpers in Jacob's crib to prevent him from getting his legs caught in the crib slats. My hypothesis being that if he didn't wake up for something like that, he wouldn't feel the need to eat at 4 in the morning.

At 4:30 Thursday morning, he woke up crying. I went in, and he had managed to get his legs under the bumper and through the slats. And of course, he wanted to eat. (Yes, I fed him.)

Last night, I put him back in the bassinet—no way to get legs stuck if there aren't any slats—and he slept until 7 am this morning. So, I was right. Being hungry doesn't wake him up, it takes something else. So now I need to figure out how to get those bumpers more secure at the bottom...