I used dog food a couple times when I want to make a "trail mix" of treats. The mix would be hot dogs, cheese, dog treats (differrent kinds), freeze dried liver, cat kibble and dog kibble. So Cody would never know what he was getting at that moment. Most of the time I choose one treat though for a training session, which one depends on what I am trying to get him to do. Scary things or things he is not to sure about (like skateboarding) I use high reward treats like hot dogs, but most things get his favorite treats. I only ever put some kibble into his mixed treat bag when I would go to agility, it kept him very excited and interested. But I would never just use his kibble as the treat, he would certainly not want to do the stuff I am asking of him just for kibble all the time. He gets it anyway during meal times.