Yea Im with Adam on this one... I weigh out my rats every week and the small rats from rodent Pro usually clock in right between 45-55gs. Getting fed every week is SO much more food then they would get in the wild... I wish I could find the picture but someone had a disection photo of a BP that was over fed and you could see the fat buildups all down the side of the snake and it was NASTY!

Rats/Mice... no difference... Only difference between the two is Rats youll only have to feed them 1 and mice youll have to feed em 2. Nutrition wise theres no difference... All what works for you and your snake.