Dodson & Horrell 16+ Cubes. Designed for an older horse or pony showing signs of aging or weight loss, Sixteen Plus Cubes are approved and fed by The Veteran Horse Society. The cubes have been specifically formulated using international studies on the nutritional requirements of the older horse. They are high calorie to minimise and prevent against weight loss, with high fibre, high oil, low sugar and starch making this it suitable for horses with Cushingoids.