Free Samples Available Again: Purina One SmartBlend & Secret Clinical July 2, 2010 at 10:30 am by Cindy Livesey | Uncategorized 0 comments The links in the post below may be affiliate links. Read the full disclosure. It looks like the following Walmart Samples are available again. Purina One SmartBlend Pet Food Secret Clinical Strength Deodorant 7sharesShare7TweetPinEmail