We tried a new brand of dog food after seeing the commercials and doing some research. Nope, it didn't work out. Doggie didn't like it, we didn't like what it was doing to her and so we stapled up the remains and I brought it back. No problems, no hassle, the cashier just asked if we had given it enough time and had we mixed it in instead of a sudden switch. All of which we did. She asked if I wanted a credit or if I just wanted to go grab a bag of the regular stuff for an exchange. I did the latter and ended up with a penny (an entire penny!) to my credit!
Neatly organized, very clean. I really like that we can bring our doggie into the store.