This paper is a position paper summarising the state of research within organic animal production in Denmark with emphasis on cattle, pigs and poultry. The goal of 100% organic feed in 2005 within EU for organic farmstock requires a high level of self-supply. Cereals and straw are limited. Forage and roughage must be part of the daily feed. The ban on GMOs, synthetic amino acids and vitamins, organic solvents, medicinal substances and early weaning reduces the number of alternatives. Research is highly needed: 1. To establish the requirements and supply of energy, essential amino acids, vitamins and minerals under organic farming conditions with slow-growing breeds, 2. To develop feeding concepts in order to improve the resistance to infectious diseases of the gastrointestinal tract, 3. To improve product quality and production economy. The challenge to nutritionists is to solve these problems in a way compatible with the holistic idea of organic farming and farm life.