Some good answers on this thread and its interesting to see how people think ... Yeah tilly and ruby are litter sisters and are roughly the same size Tilly is just the better worker :-) ... With the size aspect of things Tilly is big enough to cover anything I need so I don't really need a big dog and a smaller dog would be ideal for garden jobs etc ... After watching them grow for the last five weeks I am leaning towards the little merle as she is the one that follows me everywhere and wants to be with me the most out of all the pups ... I will make a decision by the weekend as they will be