when it comes to BCs its their breeding that matters. the ones that are bred FOR sports are the ones that are neurotic, it's because the breeder breed the highest drive most focased dogs they can find, for example Happys sister just had a litter of pups, Happys lines are known to have aggressive, extremly difficult to handle dogs, she was bred to the highest drive sport bred BC I have ever met, obvioulsy these pups are going to be insane and difficult.

a good working BC breeder shouldent have that problem, they cant very well have an aggrssive dogs that skittish of everything or trialing would be difficult as there is a test in herding trials that involves 2 dogs that dont know each other(one dog has to lift the sheep off the other) nor will the dogs succeed if they attack the sheep, or they are so crazy the sheep are frightend. but withing working breeders there is still a differnce, with sheep bred BC they will be calmer and lower to the ground, they are the ones that focas so intensly on everything. however cattle bred are a it more loopy, they are not as calm and quiet as the sheep bred because they have to keep animals 5 times their size in line, they are also more upright, and while they retain lots of focus they are not as obbessive.

for someones 1st BC a puppy is NOT reccomened, BC puppyhood is very trying, and that when most wind up dumped for a reason. an older rescue BC is usally the best option for first timers.