I have a friend that uses hog feed and has for several years. The only thing is to look for one with no meds. I am trying it in my one rack as we speak. The price is 9 dollars for 50 pounds. I have found one rat food that was that cheap, but it crumbled easy and had alot of fat and smelled horrible. Going in and coming back out. My rats are in my snake room inside the house so smell is important. I will post the details later. The only thing I saw that is a little low was the fat. The rest looked pretty good. But I supplemnt with sunflower seeds and other things. Todd