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Chewy [chewy.com] has Select Blue Buffalo Cat Food and Fresh Step Litter on sale. Add 2 of like-priced items to cart. Add 50% off promo code BUY2GET50 (discount seen later in checkout). Shipping is free on orders over $ 49 (pre-discount)

Note: You need to add items from this link [chewy.com]. If you change a weight or volume from where the link lands, it is possible it is not a qualifying item. Do not use the autoship option to add to cart, as this will override the BUY2GET50 discount.