Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. Bestiality or Zoophilia is a paraphilia involving cross-species sexual activity between human and non-human animals or a fixation on such practice. I am to understand that your friend was used to do the sexual abuse with an animal. Right? The emotional problems involved in this case for the child should be same as in the case of any sexual abuse. Studies reveals that the emotional problems include both short-term and long-term harm, including psychopathology in later life. Indicators and effects include depression, anxiety, eating disorders, poor self-esteem, somatization, sleep disturbances, and dissociative and anxiety disorders including post-traumatic stress disorder etc. Treatment is based on the present symptoms. Therefore, you should consult a clinical psychologist for a correct diagnosis and treatment. If you require more of my help in this aspect, Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe some psychotherapy techniques which should help you cure your condition further. Hope this answers your query. Available for further clarifications. Good luck.