I am going to be getting a dog within the next month. From a shelter, no akc pure breeds. I was just wondering what breeds people have had the most luck with as a trail dog. I was thinking of some of medium build, athletic, intelligent, and high energy. I also would like it to fetch, and all of that jazz. Border Collies, Austrailian Heelers and shephards, and possibly even retrievers(labs) first came to mind. Are there some other breeds that I am not thinking of? Post some pics of your trail dog. THanks