Free Wellness Canned Cat Food at Petco! This post may contain affiliate links.May 25, 2012 by Todd Hebert My kitties love Wellness canned food, & I always try to find a good deal on it when I can! Here’s a freebie for you! Right now Petco.com has a coupon for ONE free 3oz can of Sliced, Cubed or Minced Cat Food. Offer good until 6/30/12. Tell us what you think below!