My Snickers was eating Bil-Jac when I got him from the breeder. When I researched it I discovered that it wasn't a very good food. I changed to a high premium food and he became a much better eater. There are many healthy, natural foods to choose from. You can read up at this website -
Dog Food Analysis - Reviews of kibble
Most YTers feed their dogs from the 5 Star list since the protein content is high on the 6 Star foods.
I am currently feeding Timberwolf Organics and Innova Small bites. Both are very good foods and rated 5 Stars. Good luck!