In small bowl, combine ranch salad dressing and ketchup; mix well.
For each serving, spoon 1/3 of salad dressing mixture into small plastic food container with cover. Pack 1/3 of the chicken, carrots and snack sticks in separate resealable snack-sized food storage plastic bags. Pack container and bags in insulated lunch bag with ice pack.
At lunch time, dip chicken, carrots and snack sticks in salad dressing mixture.