Can they herd sheep from the beginning or do you have to train them?

They have the instinkt, (Most of them) but the commands you need you have to train. Some are really simply trained and some are harder! :)

So if you haven't taught them the commands they might herd but not the way you'd like?

Not all, but most do. I'll try and write an article about it as soon as possible so that you get more answers. :)

Okay. Thank you. :-)