Save $3 off Tidy Cats 20 lbs+ litter
Save $15 off Tidy Cats Breeze Litter System
IE Link 1 [coupons.com]
IE Link 2 [coupons.com]
Both say Petsmart Coupon instead of Manufacturer's Coupon, but they're coded as MQs. On the lower right it says in small print "Valid only at Petsmart."
Click on help to get them mailed to you as well.