[Effects of debeaking of brown one day-old chicks: Debeaking can reduce mortality rate and plumage damages]

abnormal behaviour behaviour chicks comportamiento comportamiento anormal comportement comportement anormal debeaking despicado eggs feed conversion efficiency gallina ponedora huevos hybride hybrids layer chickens laying performance mortalidad mortalite mortality oeuf performance de ponte peso poids pollito poule pondeuse poussin weight