Rat growth: speeding it up???

[ChristinaM]

To the point:

Is there such thing as power feeding rats, to get them to the size you want?

I got an awesome deal on a whole bunch of rats....some are kept for breeding, others need growing before becoming food.

I have enough in the freezer of under 100grams.

The rats I got range 30-50g ( already whacked the bigger ones). So I'd like to get them above 100gr asap ( cost me less ) but I want to do this without comprimising their nutritional value.

What's the best way/food/etc to grow them quickly, but not grow them fat.?

Thanks