I personally only feed live, its less expensive and far more convenient for me. I pay a third what normal people pay for rats and mice, I pay about 1euro per animal for any size mouse and 1.50 for rats or something. I did try breeding my own for a while but it just became more work and with my wife being allergic and with her asthma it was pretty much doctors orders to stop. I will likely try again if I ever have a house where I can have an out building. I live in Germany, we have small freezers and fridges, I do not have space for rats and mice in my freezer. That means I would have to purchase a second freezer which means more energy costs, and thats already through the roof with all the racks and terrariums and inkubator.