The effect of resource distribution and weight difference on aggression when mixing unacquainted piglets

aggressive behaviour body measurements body weight caillebotis cama (animales) communication animale communication between animals comportamiento agresivo comportement agressif litter for animals mensuration corporelle noruega norway peso corporal piggeries piglets pocilga poids corporel porcelet porcherie queue slatted floors suelo emparrillado tail