In a large mixing bowl, add the shredded chicken, cream of chicken soup, 1 cup shredded cheese, sour cream, milk, half the bacon bits, ranch seasoning, garlic powder, and black pepper. Stir together until everything is well combined.
4 cups cooked shredded chicken, 2 cans (10.5 oz each) condensed cream of chicken soup, 2 cups shredded colby jack cheese, 1 cup sour cream, ½ cup whole milk, 1 bag (3 oz) bacon bits, 1 packet (1 oz) ranch seasoning, 1 teaspoon garlic powder, ¼ teaspoon black pepper