the queen at 90

Queen Elizabeth II is seen walking in the private grounds of Windsor Castle on steps at the rear of the East Terrace and East Garden with four of her dogs, clockwise from top left: Willow (corgi), Vulcan (dorgie), Candy (dorgie) and Holly (corgi), in this official photograph released by Buckingham Palace to mark her 90th birthday, April 20, 2016. c2016 Annie Leibovitz /Handout via Reuters

Twelve U.S. presidents, but only one queen in all that time ... celebrating her birthday on the same date Adolf Hitler might have. I wonder to what extent the dogs may be credited with Elizabeth's longevity.