In a medium mixing bowl, add chicken, soup, cream cheese, cheddar cheese, ranch packet, sour cream, and pepper. Mix well.
Open the crescent rolls, separate each of the crescent rolls, and place on a large baking sheet.
Add a spoonful (about 1 ½-2 tablespoons) of the chicken mixture at the large end of the dough triangle. Roll up triangles from the larger part of the triangle. Use you fingers to keep the filling in place.
Brush reserved beaten egg on top of each crescent. Bake 15 to 17 minutes till the tops of the crescent rolls are golden brown and filling is warm.