The role that animals can play in improving people’s mental health has garnered increased attention in recent years -- from service dogs for PTSD to emotional support animals on planes to therapy dogs in offices. Dr. Maggie O’Haire, a psychologist at the Purdue University College of Veterinary Medicine, discusses animal-assisted interventions for veterans with PTSD and children with autism, what science has to say about the human-animal bond, the difference between service animals, therapy animals and emotional support animals, whether regular household pets may also affect our health and well-being – and why we all enjoy cat videos so much.