Preheat oven to 400 degrees F. Line a baking sheet with parchment paper. In a large bowl, combine the chicken, chilies, cream cheese, and shredded cheese. Unroll the pie crusts onto a lightly floured, flat surface. Cut out into rounds, using a 3-inch cookie cutter. (I had to use a 2-inch cutter, which worked great, they were just extra small.) Re-roll dough as needed. Repeat procedure with remaining pie crusts.