I fed Mazuri also when I started with chins, had the same issues with loose poo, used APD timmy and alffy until the formula changed and the chins hated it, I used nutrena but when my numbers went down I did not need 50lb bags anymore, I now I use oxbow since I can get it at my local mom and pop pet store along with hay. They are not 100% thrilled with oxbow, they eat it but they eat alot more hay, I am OK with that.