Composition of the experimental diets.

1Casein (Sigma-Aldrich, USA).
2Casein hydrolysat (Sigma-Aldrich, USA).
3L-arginine (Sigma-Aldrich, USA).
4Dextrine (Sigma-Aldrich, USA).
5Soy Lecithine (Louis François, St Maur des Fossés, France).
6Feedoil (North sea fish oil, Sopropèche, Boulogne-sur-Mer, France).
7CaHPO4.2H20 (18%P) (Sigma-Aldrich, USA).
8Glucosamine 0,5 g; Taurine 0,3 g; Betaine 0,3 g; Glycine 0,2 g; Alanine 0,2 g/100 g feed.
9Mineral mixture (g or mg/kg diet) : calcium carbonate (40%Ca), 2.15 g; magnesium oxide (60% Mg), 1.24 g; ferric citrate, 0.2 g;potassium iodide (75% I), 0.4 mg; zinc sulphate (36% Zn), 0.4 g; copper sulphate (25% Cu), 0.3 g; manganese sulphate (33% Mib), 0.3 g; dibasic calcium phosphate (20%Ca, 18%P), 5 g; cobalt sulphate, 2 mg; sodium selenite (30% Se), 3 mg; KCl, 0.9 g; NaCl, 0.4 g (UPAE (unité de préparation des aliments expérimentaux, Jouy, Inra, France)).
10Vitamin mixture (IU or mg/kg diet): DL-a tocopherol acetate, 60 IU; sodium menadione bisulphate, 5 mg; retinyl acetate, 15 000 IU; DL-cholecalciferol, 3000 IU; thiamin, 15 mg; riboflavin, 30 mg; pyridoxine, 15 mg; B12, 0.05 mg; nicotinic acid, 175 mg; folic acid, 500 mg; inositol, 1000 mg; biotin, 2.5 mg; calcium panthotenate, 50 mg; choline chloride, 2000 mg(UPAE (unité de préparation des aliments expérimentaux, Jouy, Inra, France)).
11Nitrogen-free extract (Carbohydrate) : 100– (crude protein+crude fat+crude fiber+moisture+ash).