I love the working dog trials. We see a sheep dog demonstration every year at the local
Highland Games. The ones from Australia that have always intrigued me are the ACD (Australian Cattle Dogs) I have seen videos of them bailing off a 4 wheeler at 20mph to go chase cattle, they hit the ground and roll then come up on the full run. We had one here on the farm for a while, very high energy, intense dogs.
Aaron