PrettyLitter Halloween Flash Sale: Save 22% TODAY ONLY! Posted by Hello Subscription on October 31, 2017. Subscription Box Coupons & Deals / PrettyLitter Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification PrettyLitter Spooktacular Halloween Flash Sale! Today Only, enjoy 22% Off your first subscription order with coupon code: SPOOKY at checkout Hurry, offer expires at midnight on Halloween! Check out our PrettyLitter review to find out more!