LonelinessSocial IsolationSocial BehaviorSocial SupportSocial EnvironmentArvicolinaeStress, PsychologicalInterpersonal RelationsSocial PerceptionProjective TechniquesDepressionBehavior, AnimalHealth StatusSocial AdjustmentPolydipsiaAnxietyQuestionnairesLegal GuardiansHousing, AnimalAdaptation, PsychologicalEmotionsChicagoSocial ClassLongitudinal StudiesHandling (Psychology)Socioeconomic FactorsSocial IdentificationQuality of LifeSocial DominanceDepressive Disorder