The ball I got was a yearling and I'm very happy with her, and she still has quite a bit to grow so I'm not missing out on much.

Whats the difference between an '08 hatchling and maybe an '07 in BCI's? On the one hand, I had good results with my yearling ball, she's nice, good feeder, healthy, etc... On the other hand, I don't want to miss too much of my new pet's growth.