There are some severe cases when the emotional state of an animal interferes with the implementation of behaviour modification, these are the cases where the use of medication can be justified <ref>Marder, A.R.; Posage, J.M. p160, Chapter 11, Treatment of Emotional Distress and Disorders - Pharmacological Methods: Mental Health and Well-Being in Animals.</ref>. | There are some severe cases when the emotional state of an animal interferes with the implementation of behaviour modification, these are the cases where the use of medication can be justified <ref>Marder, A.R.; Posage, J.M. p160, Chapter 11, Treatment of Emotional Distress and Disorders - Pharmacological Methods: Mental Health and Well-Being in Animals.</ref>. |