I cannot say anything on the sheds but trackign dogs I can give you a lot of info. I would first look at the web site
www.unitedbloodtrackers.org you can also look at my web site
www.hillockkennels.com then go to the page for training your BMH. Both web sites have a lot of good information on them. I would start with a young dog. Most hunting breeds will work for the average hunter who is just needing a tracking dog for thenselves and maybe their friends. You do not need one of the specialty breeds unless you are going to regularly be tracking deer shot 20-40 hrs after the shot and a lot of them. The reason to start with a young dog is that it takes a couple of years of working with them to get a dog that you know and can trust on a track. If you start with an older dog by the time you have it trained the dog will only have a few usefully years left and you will have to start all over training a new dog. I do not know where you are located but I hear UBT will be holding a tracking seminar in mid west Alabama this coming Feb. Keep an eye on their web site as details will be posted soon.
Good luck training your dog.
Ken