The pet food "brands" don't have their own factories. They all contract it out to the same place. A few journalists remarked on this secret fact that came out because of the recall.
We agonize over which brand is healthier for our cats and dogs, but it's all an illusion. The majority of US and Canadian pet food is made at one factory with the same basic animal ingredients, same quality control, same employees, and the same machines. Maybe they adjust the proportions slightly and tweak the flavors. Then they slap on different labels like Purina, Iams, Royal Canin, whatever.
It's saddening to learn that we really don't have as much choice as we think. I'm much more skeptical and questioning than the average person, and yet I assumed that the pet food's "brand name" somehow made a difference.