Preheat oven to 350. Spray 13x9" baking dish with cooking spray.
Trim fat from chicken breasts. Place breasts between 2 pieces of wax paper. Pound to flatten thin.
Mix softened cream cheese with chives. To be divided between the six chicken breasts
Lay 1 piece of bacon under each chicken breast. Spread cream cheese mixture on each chicken breast. Roll chicken and bacon. Before closing top each roll with 1 tsp of butter or margarine. Secure with toothpicks.
Bake uncovered for 1 hour or until chicken is cooked through.