I am a nanny for two children. They are a year and a half apart. They fight all day every day and over everything. I spend 12 hours a day with them. I need for this to stop. I would humbly request your best advice for dealing with sibling rivalry. Issues include fighting, arguing, hitting, antagonizing, constantly trying to one up the other, not being able to sit on a sofa and watch a movie without some of the above occuring, not being able to keep their hands and feet to themselves at breakfast, dinner, lunch, etc. HELP!! They are 4 and a half and 6 years old.