Prophylactic supplementation of selenium to pregnant ewes

additif aux aliments des animaux aditivos de piensos agneau alimentation brebis carence en substance nutritive concentrates cordero deficiencias nutritivas deficiency diseases enfermedades musculares ewes feed additives feeding forraje grosero fourrage grossier highlands immunosuppression injection lambs maladie de carence muscular diseases myopathie noruega norway nutrient deficiencies oveja perinatal period piensos concentrados roughage selenio selenium suplementos supplements vitamin e vitamina e vitamine e