When lambs (14 days old) were placed in an open space, those reared in isolation were more withdrawn (were slow to begin moving, vocalized infrequently and avoided new objects) than lambs reared with dams or with other lambs. The difference in response was less pronounced when all lambs were retested 28 days later. There was no difference between groups in levels of adrenal glucocorticoids, which were measured immediately after testing.
|Publication Title||Applied Animal Ethology|
|Author Address||Dep. Anim. Sci., Univ., Davis, California 95616, USA.|
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