The psychological benefits of living with (don’t say “owning”) a cat may cut your risk of dying of a heart attack by 30 percent, according to a University of Minnesota study. While some heart experts debated these results, claiming that dogs do better at preventing heart disease deaths, the pussycat data were scratched from a 10-year survey of 4,435 Americans. Dosage: Stroke behind ears 40 times a day.