Crockpot: Heat chicken and hot sauce in a saucepan over medium heat. Stir in cream cheese and ranch dressing. Cook, stirring until well blended and warm. Mix in 1/2 of the shredded cheese. Transfer to a slow cooker. Sprinkle remaining cheese on top; Cover and cook on low setting until hot and bubbly.
Oven: Put ingredients into a 9x13 pan. Bake at 350 degrees Fahrenheit for 20-25 min.