ive found that the other way round. collies running good one night , one of the best ive seen , next time not picking up just herding them or coming back looking like hed treid . brains is another word for sly fecer . bull cross , what you see is what you get .
very true, very rarely will you see a bull cross pick its runs like a collie cross. And if you pick the right pup from the start the agility will be there too!