President BidenJoe BidenCDC chief clarifies vaccine comments: 'There will be no nationwide mandate' Overnight Defense: First group of Afghan evacuees arrives in Virginia | Biden signs Capitol security funding bill, reimbursing Guard | Pentagon raises health protection level weeks after lowering it Biden urges local governments to stave off evictions MORE and first lady Jill BidenJill BidenThe Hill's Morning Report - Presented by Facebook - Biden sets new vaccine mandate as COVID-19 cases surge First lady leaves Walter Reed after foot procedure Biden backs effort to include immigration in budget package MORE’s German shepherds were moved to the Biden family home in Delaware last week after one of the dogs, Major, demonstrated aggressive behavior at the White House, CNN first reported.

Major had a “biting incident” with a security team member at the White House, according to the outlet. The 3-year-old dog was adopted by the Bidens in November 2018 from a Delaware animal shelter.

The victim’s condition was not immediately confirmed.

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Unidentified sources told CNN that Major had previously “charged” at staff and security employees. 

The Bidens’ older German Shepherd, Champ, is 13. He also moved to the Biden’s Delaware home.

The dogs initially moved into the White House in January following Biden’s inauguration. Major is the first shelter rescue dog to live in the White House.

The dogs last month appeared alongside the first lady during the annual Puppy Bowl in a public service announcement encouraging Americans to wear masks amid the ongoing coronavirus pandemic.

The Hill has reached out to the White House for comment.