Head over to Wal Mart's website and sign up to receive a free sample of pet food!
One idea for these samples if you don't want to use them is to donate them or do what I do. I have adopted a nice little kitty outside that I feed with all of my free samples and free after coupons pet food that I get! He is scared to death of me, but he loves the food!
(Thanks Mojo Savings!)