My Purina Reward app. Upload receipts for Purina brand products like Dog Chow, Fancy Feast and Tidy Cat for points to trade for free products including pet toys like Kong or Purina products. Even if you don’t buy anything Purina, every few months they offer something free for no points. I’ve received a $30 box of Fortiflora for no points as well as cans of food and packets of treats. And I had several no point offers as soon as I signed up- Free cans of food and treats for both dogs and cats.

Canada has a similar program but I think this app is just USA.