A brainy Cocker Spaniel called Nancy has been dubbed one of Britain's smartest dogs after winning a game of Connect Four.<br /><br />Lynn Stacey, 58, who lives in the UK filmed assistance dog Nancy, six, successfully getting three in a row on a smaller children’s version of Connect Four.<br /><br />Nancy learned many of her tricks from her former best friend, Cocker Spaniel Bella.<br /><br />The bright pooch knew more than 500 tricks, but sadly passed away last year at the age of 13.
