temps (durée) (1) comportement (1) aliment (1) Food (1) Treatment (1) Control (1) Observations (1) Observations (1) States (1) Walking (1) Time (1) Science (1) Play (1) Lambs (1) Home (1) Food (1) Expression (1) Emotions (1) Animals (1) Opportunity (1) States (1) Number (1) arène (1)