I might have missed it, but how many litterboxes do you have? I'm sure you'ce heard the rule of thumb story of one box per cat plus one. I have 5 cats and I lost count on how many boxes My Allen pees when he's mad at us for some unknown reason. When he does this, I buy a couple bags of Cat Attract litter. Its the BEST. You can get it from Petsmart. Well worth the $12 per bag. I don't know what they put in it, but it works like a charm every time. I ned to get a bag right now -- I caught him using hte laundry basket the other day