Hi.. BC's are my favorite dog but the reason I don't have one is because I don't have the facilities for it to run or herd. They are great at dog agility if you have the time to train it. A woman in my neighborhood has one and said she was sorry for the dog, as she doesn't give it the time it deserves and needs...so maybe that's why your dad doesn't want to get your hopes up..but I'm rooting for you anyway because as much as I worship my dog, I just love BC's the best. good luck!
Keep us informed.......K