Although I know TONS of great people who use hot dogs, I have not been able to bring myself to since reading a study that linked childhood leukemia to frequent hot dog meals. Sheesh, aren't our dog's lives short enough anyway?:(
I prefer to cook my own, liver, heart, chicken, turkey, etc.
Be careful when you buy treats from stores, even the Nutro training treats have propylene glycol in them. (The same thing that is in paint, and the label on the paint cans has a warning on it that says not to breath it or even get it on your skin!) It is a softening agent and is used in small amounts for food, but still!
When I was in a hurry one day, I did stumble on something pretty healthy and VERY handy. It's called "Dick VanPatton's all natural dog food". It looks like a big summer sausage, almost like "Rollover" but alot cheaper. It is meant to feed like a main diet but I wouldn't recommend it. For treats it works out great. I have yet to find a dog that doesn't go nuts for it. It's easy to get too, Petco and Petsmart both carry it.