OFFER EXPIRED Save 20% off sitewide at Petco.com. Dress your fur baby for Halloween with this offer from Petco. Now would also be a good time to stock up on stocking stuffers too. Maybe you just need supplies – whatever it may be – save yourself 20% off the prices found at Petco.com. *Exclusions apply, so be sure to see what they are before you purchase…you want to get the most of your money!