We bought our membership strictly for the dog food savings — it easily pays for itself. That member testimonial is not an unusual sentiment in the Costco pet-owner community. It is a consistent theme across pet-owning member communities — the recognition that Kirkland Signature dog and cat food delivers quality that rivals premium pet store brands at a cost per pound that is dramatically lower. Both dried dog and cat food cost over $1 less per pound at Costco compared to Petc