Pharmacological Treatment of Compulsive Sexual Behavior in a Pekingese Dog: A Case Report

Inappropriate and repetitive sexual behaviors in dogs are considered a manifestation of obsessive-compulsive behavior, although documented cases remain limited.This case report describes a 2-year-old neutered male Pekingese that was presented to our hospital with lifelong excessive genital licking and solitary mounting behavior.Differential diagnostic evaluation excluded physical abnormalities that could cause pain or pruritus, especially those centered on the hind body.The behaviors occurred abruptly and unpredictably, independent of context, including periods of rest, walking, eating, or during excitement.In particular, the mounting behavior resembled sexual behavior, involving lowering of the hind body and pelvic thrusting without a target such as the owner or objects.Pharmacological treatment, including fluoxetine, was administered to manage problematic behaviors.This behavior was diagnosed as an obsessive-compulsive disorder, and improvement was observed following administration of fluoxetine, a selective serotonin reuptake inhibitor (SSRI), which is particularly effective for managing such behaviors.The frequency of the problematic behaviors was monitored, showing a notable decrease over time.