From a story on politico.com by Andrew Zhang headlined “Biden family dog Commander has bitten several Secret Service Agents, emails show”:

The Biden family’s dog, Commander, has bitten several Secret Service agents — sending one to the hospital — and exhibited “aggressive behavior” in at least 10 incidents since he took residence in the White House in December 2021, emails obtained by a conservative watchdog agency show.

The emails describe several biting incidents involving the 2-year-old German Shepherd between Washington and Delaware, where the Bidens often frequent, dating from October 2022 to January of this year. Judicial Watch, a Washington-based conservative group, obtained the records through a Freedom of Information Act request to the Department of Homeland Security and published them Tuesday morning.