I bought Special Kitty Clumping Scented Litter at Walmart in Longueiul,Q.C. this week for $8.98,well,I opened it today(18kg) and since my cat used it,his feet have turned black and Ive been cleaning black marks all over my house!!!!!I threw out my slippers,I thought it was them!!!!Until I checked his paws!!!!NOT IMPRESSED AT ALL!!!!!