I got dented cans from chewy.com once. I took photos of them and emailed them to to their customer service department along with my receipt. They immediately sent an entire new box of new, undented cans for free.
The sad part is, much as I want to keep my business in the local stores, chewy has the best prices on the prescription foods my dog has to eat. I save quite a bit of money going through them, which is their business model - but I still frequent my local store for treats and goodies.