"I haven't posted for a week as I [have] been mourning the death of my dog, Mozart, who I personally delivered out of his mother's womb," wrote Hayek. "He was found dead in my ranch last Friday with a shot close to his heart."
While paying tribute to Mozart, the post also served as an impassioned plea from the actress for authorities to find justice for the slain pet.
"He loved his territory and never strayed away... [He] was the most loving and loyal companion," wrote Hayek. "He didn't deserve a slow and painful death."