On Border Collies - they are so smart, but just wound up a little tighter than my laid back Aussies. They are, however, worked on ducks as well as cattle and sheep. I wouldn't discount them as a choice if you were able to find a good breeder with a little more laid back collies for duck and sheep work. Sometimes those "gritty" dogs used on cattle come by it genetically.
I think Shar Peis were bred as hunting dogs, possibly for the procurement of Asiatic Lion? I can imagine that the hunting drive is pretty strong in them and that the chickens wouldn't be too safe :O)
We have hunting dogs as well - curs and bulldogs. To keep them legged up, I have a horse walker that they snap to on nights when they aren't hunting. That walker is near a fence line right next to my chicken coop. The curs are pretty well broken off of non game animals and pay the hens no mind. Those bulldogs are another story. If given the opportunity, they would be eating chicken every night. Not because they are mean or anything, but just because their prey drive is so strong and a bully is always hungry. The younger of the two gets his feelings hurt when I yell at him for coveting chickens.
Incidentally, we bought the chickens for the hunting dogs. We figured the eggs would be a good supplement for them nutritionally. When hunting, they might cover 15 to 20 miles in a single evening. We had to get enough chickens to ensure an egg for each dog daily.
M