Best Dog for Protecting Flock?

[RayRoe]

My dog is a border collie, blue heeler mix. We have chickens, cats, goats, and cattle. She goes after the chicks and kittens. But other than that she never bothers any of our animals. But she does need daily contact with humans. Hope this helps some.

 

[Chicken_You_Out]

Just as the title says, I am looking for a good dog to protect my chickens and turkeys, even my outdoor cats (I also have goats). Suggestions on breed?

Also the dog would be outdoor and would have to tolerate both hot/cold weather (though obviously I'd have a shelter for it and all that).

I have no real idea, but our dobermans seem to protect our chickens quite well. The chickens hate them XD. They are also the biggest sweethearts. I've heard Aussies are good, though.