Hi T.-
I have a little experience, as I nannied for a family of 5 children, ages 6, 7, 8, 9, and 10. They were a mixed family on their respective second marriages. The father was a widowed pharmacist, and the mother was a former EMT, now a successful midwife. Both were experienced with alternative medicines, and natural remedies.
All of the children had their own quirks, as they all do. Some were more pronounced than others. Several times they were told to medicate. But they stuck to their beliefs.
It was a hard battle at times, but we had a plan and we stuck to it. After cutting out a diet full of processed foods, sugars, and fats in favor of a nautral, raw, and organic mostly vegetarian diet, we looked at altering the children's lifestyle.
We started with less (almost NO) TV and video games, and began involving them in arts, music, crafts, and physical exercise. We hiked, biked, climbed, and white water rafted with them. We were a team. They all excelled in their own ways, but when it came down to it, they had to also cooperate and help the younger ones, and act as a team to achieve the goal. Keep them busy, and they sleep like angels.
They all had their own chores to do as well. They all learned to cook, clean, sort, pre-treat and fold, as well as put away.
It wasn't always perfect, in fact quite hard at times. Especially whe you are the one who wants the greasy burger and soda. But we all lived, and they all thrived.
The end result is an incredible work of art called a family. They have had their fair share of trouble in the teenage years, the wrong friends and peer pressure, experimentation with drinking and drugs. But they are blessed to have a computer programmer, a nurse, an esthetitian, an aspiring chef, and an artist.