Both of these female snakes were born on Nov. 11th 2008(Lucky's kids). They have been raised together in the same enclosure. The difference is their food. The larger one eats everything offered, pinkies, nightcrawlers, salmon.
The smaller one will only eat guppies and nothing else. Some of this partity is due to the fact the good eater gets fed more often since it will eat anything. The smaller was fed less often due to the availablity of food. The smaller was fed guppies every 5 to 7 days.
A well balanced diet does have its advantages.