Feeding Frenzy

7:45am:  Jack finishes eating breakfast.

8:00am:  Jack asks for a snack.  Denied.

8:30-10:45am:  Jack is at preschool, and has snack time while he's there.

11:40am:  Back at home, Jack starts begging for lunch.

12:00pm:  Jack gets down from the table, having eaten his lunch.  Immediately asks for a snack.

Growth spurt?  Hollow leg?  Tape worm?

Can't decide.