Don't-know-what's-so-holy-about-a-mackerel, but this kid is HUGE

Here's Isaac ready to leave the hospital one day after birth...



...and here is this evening at three months and six days...



Now, two questions:

1. How did he get so big so fast?!

2. Could it really be time for a new carseat already?!

I just read the height and weight requirements for his infant carseat and it says it's for 26" max length, and for 5-20 pounds. So, we weighed Zac five days ago and he was EIGHTEEN POUNDS.

We gotta put this baby on a diet!