Preheat the oven to 350 degrees. In a large bowl, combine the first six dry ingredients. Slowly add oil, broth and chicken, and mix well. On a lightly floured surface, roll the dough to a thickness of 1/8 inch, then place it on a greased cookie sheet. Bake until golden brown. Cool, then break into bite-sized pieces. Place pieces in a bag with the brewer's yeast and shake to coat them. Store leftovers in an airtight container in the refrigerator.
Makes 2 to 3 dozen pieces.