Reading old threads and saw this one. My main problem with big dogs or "one out" is they are horrible in brush I'm sorry but I have never seen a Great Dane or for that fact any big dog that can keep up at all in thick brush. Also they have to be the worst at crossing fences. Where I hunt we have 5 wire barbed wire fences and in some places 6. So until you get that monster to jump over a fence. I don't find much use for them in my woods.
Too each his own. I have some big dogs. No they can't run thru brush quite as fast but even small dogs can't keep up with a 50 lb pig in briars.