Jo takes on the daily battle over food, one of the most common issues faced by mums and dads up and down the country. In Nottingham she meets a family whose seven-year-old son Rio eats almost nothing but bread and butter. As well as impacting on Rio's health and development, it turns every meal time into an emotional struggle. Jo also visits a family in Birmingham whose three-year-old daughter Katie-Ann constantly pulls her hair out, leaving bald patches all over her head. After trying everything they can to get her to stop, Katie-Ann's parents hope a visit from Jo will finally provide a solution. And continuing her investigations into commonly held parenting beliefs, in this week's big event Jo examines the link between sugar and hyperactivity. Working with Dr David Daley, a specialist in hyperactive behaviour, Jo throws a party for 40 six-year-olds to discover whether different diets have any impact on their energy levels.