Donald Trump has beefed up his security detail at Mar-a-Lago with a Secret Service robot dog — with photos showing the four-legged sentry patrolling the sprawling Florida property.The robotic hound was seen mechanically strolling on the grass among the palm trees outside of the Palm Beach estate on Friday morning, video shows.“DO NOT PET” reads a large warning on its side.The remotely-controlled robot dog, made by Boston Dynamics, is with the United States Secret Service, the agency confirmed.“Safeguarding the President-elect is a top priority,” an USSS spokesperson told The Post.“While we cannot get into the specific capabilities, the robotic dogs are equipped with surveillance technology, and an array of advanced sensors that support our protective operations.”The president-elect, who survived two assassination attempts on the campaign trail this year, has been working behind closed doors at Mar-a-Lago to staff his incoming administration after his sweeping victory over Vice President Kamala Harris Tuesday.Robot hounds have been gaining popularity among public safety agencies nationwide as a tool to keep law enforcement officers and emergency responders out of harm’s way.The NYPD assembled a robotic K-9 unit of three of the remote-controlled pooches called “Digidogs,” Mayor Eric Adams announced last year.The robots were first leased from Boston Dynamics by the Blasio administration — but were scrapped after they were dragged by social media users who said they seemed like something out of a “Black Mirror” episode.When a parking garage collapsed in lower Manhattan last year, The FDNY sent in its $75,000 robot dog into the rubble to look for survivors and assess the destruction that killed one person and injured five.The robot dogs also have military uses.Ukraine’s military deployed 30 of the $9,000-a-pop robo hounds made by the company Brit Alliance on battlefield against Russia earlier this year.The metal pooches serve as walking dron...