Free Sample: Purina One SmartBlend Dog Food June 4, 2010 at 10:00 am by Cindy Livesey | Freebies 0 comments Boy Walmart is really putting out a lot of Free samples lately. This time you can get a Free Sample of Purina One SmartBlend. Head over here to get your free sample. (thanks Kara!) The links in the post above may be affiliate links. Read the full disclosure.