01 - Preheat oven to 350°F.
02 - In a large mixing bowl, thoroughly blend shredded chicken, softened cream cheese, cheddar cheese, ranch seasoning, and milk until evenly combined.
03 - Fold in half of the crumbled bacon to distribute evenly through the mixture.
04 - Transfer the chicken mixture to a baking dish and bake uncovered for 20 to 25 minutes, or until hot and bubbling.
05 - Stir the filling, then portion generously onto the bottom halves of the sandwich buns.
06 - Top each with the remaining bacon and, if desired, garnish with pickles, lettuce, or tomato. Cover with the top bun and serve warm.