I started hunting Tip(Bullmastiff Pit cross) last summer leading him to 25 yards and now I cut him anywhere from 150 - 400 plus. He's caught some good boars and lived longer and caught more hogs than any catch dog I've owned. I've never had any problems with fences or brush but he's a cross that only weighs in the 125 range. I really like bghogdogtx cross; that's my kinda dog.