Ok thanks I seen on one of those rat forums that a 20% protein some said is ok if thats the only sorce of protein. Since I do have a bag of this 23% protein stuff Im going to use it until its gone. Im working on getting the Mazuri 6f. Im trying to find it around here so I dont have to have it shipped. I have used this stuff I have now before. I didnt really have any trouble with it before. But the reason I stopped using it was because they were wasting alot of it when I was using tanks. Now that I have the racks built they dont waste any. While they were in the tanks I just used dog food. I have no clue what % protein it was. And they did great on that, but now with the rack I cant use the dog food. So I am going to get something lower in protein like the Mazuri 6f, and see how that goes. Thank again for all the help.