Perla, a Russell Terrier is introduced during a press conference ahead of the 137th Westminster Kennel Club Dog Show in New York, Feb 7, 2013. Russell Terriers will join Treeing Walker Coonhounds as the two new breeds in the 137th Westminster Kennel Club Dog Show which will feature some 2,721 dogs and will be held in New York City on Feb 11 and 12, 2013. [Photo/Agencies]