mouse vs. rat as food...

[mykee]

My question to all of you is this; have any of you ever monitored the growth rate of their bp on rats vs. mice. I continue to hear that rats are much better nutrition-wise than mice. I am curious as to weight gain. I have a 10 month old fem. ball who is a strict rat eater, and she is 994 g, and her brother, a strict mouse eater is 480g. The major difference in weight in this particular scenario is the fact that my rat eater, has only refused 5 meals (fed on a weekly basis) in 9 mos. while my mouse eater, consistently eats every three weeks (1 food item). I am curious to know if you have any bp's that eat fairly consistently, on rats, or on mice, and what the size difference is between them.