Becareful using Tractor Supply Pine Flake, depending on where they source the flake it may or may not be kiln dried. Was using it for little over a year then almost 1/2 my colony stated dying off. The ones that got bedding for the new bag I had opened. Contacted TSC about it and they informed me that the new bag may not have been kiln dried. I tried warning people in the reviews section of the product online and they kept moderating my review (refusing to put it up). If you look in the Q&A section of the large flake web page ( I'm Stephen 321) I tried getting a clear answer as to whether or not the pine flake is safe for animals and they couldn't/wouldn't answer online. Just said call customer service or a vet...like a random vet would know if their product is safe.