The short answer is "Yes, Diamond Pet Foods also manufactures the Chicken Soup for the Pet Lover's Soul." However, in fairness to the company, it also should be noted that the Chicken Soup products were not recalled.
The recalled brands of Diamond Pet Food contained toxic levels of aflatoxin, and the corn which developed this contaminant came from one single source. Since "Chicken Soup" contains no corn products, it was not recalled. The lack of corn is one of the reasons why I recommend Chicken Soup for the Pet Lover's Soul, and I will continue to recommend it and feed it to my own cats.
It is my opinion that the Diamond Pet Foods company has acted swiftly and responsibly in mitigating a tragic situation for all concerned. Anyone with doubts should read their Updates and Press Releases, and then form their own opinions.