Following the first incident, Major had a round of training in Biden's home state DE to help acclimate him to life at the 18-acre complex in Washington, where he is surrounded by aides and security officers.
The dog "nipped someone while on a walk" earlier this month, first lady Jill Biden's spokesman, Michael LaRosa, said. "Out of an abundance of caution, the individual was seen by WHMU and then returned to work without injury".
It came a day after it was revealed Major had nipped a second person in the space of a month.
The White House was initially silent on the biting incident but later offered a partial explanation - the equivalent of saying Major was taking time away from official duties to spend time with family.
"With the First Lady traveling for three days, Champ and Major went to DE to stay with family friends", LaRosa said before it was confirmed that they would return to the White House. The nipping incident comes a few weeks after the dog caused a minor injury to someone else at the White House.
"He's a sweet dog", President Joe Biden has said. He was sent away to Biden's DE home after the incident. "And [Major] moves to protect", said Biden.
He said the dogs went to Wilmington because he was going to be out of town.
'I didn't banish him to home. I was going to be away for two, so we took him home, ' Biden said at the time.
Last week, one of the two German shepherds waited on the balcony of the White House as Marine One landed on the South Lawn, having ferried the president back from a speech in Columbus, Ohio.
Biden told "Good Morning America" after Major first bit someone that he would be put in training.