PetSmart: $5 off Any Purchase Coupon April 5, 2011 This post may contain a link to an affiliate. See my disclosure policy for more information. Currently, PetSmart is offering a coupon for $5 off any purchase to PetPerks members! To get your coupon, login or sign up for PetPerks, then click on the ‘Coupons’ tab. The FREE Royal Canin Selective Discovery box coupon is also still available to print! Thanks, SwagGrabber!