My dear, 108 pounds is nothing! With seven cats (soon to be 9 tomorrow) you go through it a lot faster!

Right now I have (3) 40 pound tubs plus one Tidy Cats 20 pound tub thats half full. All the 40 pounders are completely full. I don't know WHAT I expect to run into to make me run out of 100 pounds of litter over night.