Is it obligatory to inform the owner of the sheep about seeing a young man engaging in sexual acts with them daily, and what is the best way to do so while ensuring the anonymity of the informant for fear of harm?

If a young man is indeed committing the reprehensible act of bestiality, then this is among the most heinous of sins. It has been reported that the perpetrator of such an act is cursed, and there are commands to kill him and to kill the animal. It is not permissible to remain silent about this evil if one is able to change it with their hand or tongue, unless there is harm in the denouncement, in which case a denouncement by heart suffices. It is obligatory to inform the owner of the sheep or someone who can prevent this act, through a mahram, or by calling or sending an anonymous message. If that is not possible or entails harm, then denouncement by heart is the minimum obligatory act. It is forbidden to look at this abominable act.