This video is of the Rooky Racers at Wimbledon on 17th May 2009. Tosca is running as the 3rd dog and Milly is running 4th:

The following video's - all are of the Brimblecombe Babies (Dizzy, Milly, Jake, Bovril and Jess) were taken at Maddoxford Farm, Botley event. There is quite a bit of wind noise, but you can hear the screaming and shouting above all of this!  There were 5 Heats and 3 races per Heat. Here are just 4 of the 15 races .

I'm in the bright green jacket!