Dennis Adkins’s 9-year-old Pomeranian, Cleo, became sick and died of kidney failure last month after eating Waggin’ Train’s “Yam Good” chicken-wrapped treats, according to the complaint filed yesterday in federal court in Chicago. “Waggin’ Train has spent millions of dollars in promoting trust and confidence among consumers in its pet food products,” Adkins said in the complaint. “The product was not wholesome, was not nutritious and was unhealthy.”