Agreed.
I fed mice to my babies until this past season, when I was able to find a local rat breeder in my area. You'd be amazed at the difference in growth. I have 4-month old babies that are almost on weaned rats. And I feed once per week--no power-feeding here! The growth rate on rat pups is much higher than with mice. Rat pups have larger bones and internal organs, which equals better nutrition to the snake IMHO.