Clipper, a German Shepherd, supervises eight of the dogs of John F. Kennedy's household at Squaw Island, Hyannis Port, Massachusetts on Aug. 14, 1963. White House aide Traphes Bryant holds Charlie, a Welsh terrier and four of Charlie's puppies, Blackie, White Tip, Streaker and Butterfly. Capt. Cecil Stoughton, Army Signal Corps, holds a new arrival, a Cocker Spaniel named Shannon, and a yet unnamed Irish Wolfhound.   Still in Washington is Pushinka, the daughter of a Soviet space dog.