They need to extend the study to identify whether it is dry food or canned food that is providing the benefits. My guess is that the tykes are getting into the dry food.
LOL. They may be eating other things too.
I was in a PetSmart a while back, and this woman brought in her dog on a leash and her little boy... Well, she was so busy with the dog, that she lost track of the little kid, who wandered over to the pet treat "buffet" and started helping himself. He was on his third or fourth doggie treat before one of the PetSmart staffers noticed!
Mark