Jackie and Barney in Derby Day
Biography
Barney is Jackie Condon's enormous dog. In One Terrible Day, Barney gets to go on Mrs. Pennington Van Rensselaer's outing when he is sneaked into the back of her car, and he pulls Jackie on a small chariot in the race in Derby Day. In both films, Jackie gets dragged by Barney for a considerable distance.
Barney, or perhaps litter-mates who look identical, have small parts in several other early silents.