ENJOY YOUR FOOD - FIGHT DK. After all that festive food, it's time to attack that plaque. DK, a cartoon baddie in the shape of a rotten tooth, is featured in a colour leaflet-poster designed to encourage children to keep their teeth healthy. Produced by the National Dairy Council with the British Dental Association, it encourages decreased consumption of sugary food and drinks and recommends appropriate snacks to help improve dental health and nutrient intake. Free from the education department, National Dairy Council, 5-7 John Princes Street, London W1M OAP.