Pet dog Max was found with both eyes gouged out last month in Yucatan, Mexico.
The family said the six-month-old had gone missing the day before they found him near a wasteland behind a school in Tizimin, yelping.
After an emergency examination, vets said the cocker-dachshund mix had also suffered sexual abuse.
Max had to be put to sleep right away to prevent further suffering.
Max’s family, together with activist Doris Canul Chan, reported the incident to the police the next day.
Authorities are still trying to locate the aggressors.