she does look a little small, how long have you had her? my bp is a little bigger then that she is around 16 inches and i have her eating small adult mice. she takes it no problem. the prey should at least be as big as the widest part of your snake. if you go to big she may regurge wich is not good for the snake. i feed every 5 days and my bp seems to be gaining weight and looking healthier! she was really skinny when i bought her from petsmart. usually pinkies and fuzzies are for newborns. if you have to feed her twice in one day then you should definately go up a size in prey. you will be suprised on how big of a prey she can eat! she is a very beautiful snake!!