One of President Joe Biden’s dogs has been involved in a biting incident, weeks after causing injury to a person on White House grounds. Major, the family’s younger dog, “nipped someone while on a walk” on Monday, Michael LaRosa, press secretary to First Lady Jill Biden told The Associated Press, adding that the dog “is still adjusting to his new surroundings.” Two people with knowledge of the incident told CNN that Major, a three-year-old German shepherd, bit a National Park Service staff member on the White House South Lawn while they were working, and that the employee required medical attention from the White House medical unit (WHMU). “Yes, Major nipped someone on a walk. Out of an abundance of caution, the individual was seen by WHMU and then returned to work without injury,” LaRosa told CNN. The dog had been seen by reporters on a walk around the White House …