Quote Originally Posted by trott View Post
Switch to rats and it will grow like a weed. I've got a hatch that weighed 60g when i got her in july and she now weighs 175g. On rat pinkys and rat fuzzies.

I've got a normal that will only eat live mice, shes a year old and half the size of my others that are on FT rats. Rats have a much higher nutritional value and protein compared to mice.
There haven't been any studies to show that rats have more nutritional value than mice. I've happened to have the same anecdotal experience you've had (with an animal growing much better on rats than mice) but I've talked to other people who have had the opposite happen.