You can get a free sample of cat food. Specifically this free cat sample is for Cat treats. Yo could also choose dog food if you really want to.
Just don’t get them the triangles damn it!
Free Sample Bag of Catswell Treats for Cats or Dog Food Bag
https://www.facebook.com/PetSmart/app_191610740856968 - Scroll down further on the facebook page for the other cat and dog food offers.