Yikes.
The only thing you can do is get one of the more expensive, more natural(?) dog foods.
There are foods out there that don't use any preservatives and hydrogenated fats.
It's amazing to me that we can feed our animals the same thing every day, for years and years. It's not just the eating the same thing part, but whos to say that the food contains everything the animal needs to live a long, healthy life?
Most animals die a slow, often painful death as they near the end of their lives.. just as people do. Now, don't get me wrong.. the quality of life for our animals is extremely high, but.. we all know that diet and environment are the two most important things to living a long, healthy life.
There has got to be a better food out there than dried nuggets of god knows what.. lol