Atila, a trained therapeutic greyhound used to treat patients with mental health issues and learning difficulties, falls asleep as it gets caressed by three patients at Benito Menni health facility in Elizondo, northern Spain, February 13, 2017. REUTERS/Susana Vera SEARCH "DOG THERAPY" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY