Snoop Dogg is suing Walmart and Post because his cereal brand failed—but is it really their fault?

 Snoop Dogg is suing Walmart and Post because his cereal brand failed—but is it really their fault?

Since putting his successful hip-hop career on ice, Snoop Dogg has embraced a very lucrative new calling as America’s most ubiquitous celebrity pitchman. Going through his roster of product endorseme…