Quote Originally Posted by toe_knee
i have been feeding my Bp's mice from a local pet store and they have grown since i have had them. but i recently switched to f/t from NERD's and they have grown quite a bit more from just from switching. is it that the NERD mice are feed a better food???

So that's how they do it?!?! It's all in the mice.

I agree with Cass. It's probably either a growth spurt or you are feeding slightly more, by weight.