have you thought of printing stuff out to show her? Do you have a local PETA chapter? ASPCA chapter? You could tip them off and let them do the dirty work...
A study conducted by Northeastern University and the Massachusetts SPCA found that people who abuse animals are five times more likely to commit violent crimes against humans. The majority of inmates scheduled to be executed for murder at California’s San Quentin penitentiary “practiced” their crimes on animals, according to the warden.
• As a child, serial killer and rapist Ted Bundy—ultimately convicted of two killings but suspected of murdering more than 40 women—witnessed his father’s violence toward animals, and he himself subsequently tortured animals.
• Earl Kenneth Shriner, who raped and stabbed a 7-year-old boy, was known in his neighborhood for hanging cats and torturing dogs.
• David Berkowitz (a.k.a. “Son of Sam”), who pleaded guilty to 13 murder and attempted murder charges, shot a neighbor’s Labrador retriever.
• Brenda Spencer, who opened fire at a California school, killing two children and injuring nine others, had repeatedly abused cats and dogs, often setting their tails on fire.
• Serial killer and cannibal Jeffrey Dahmer impaled the heads of dogs and cats on sticks.
ETA: many of these kids who abuse animals are also themselves abused