Bloody hell mate if my dog barked down a rabbit hole to mark i wouldn`t be to happy you will learn the dogs style in how it will mark my beddy cross will mark a rabbit by stareing at the hole then looking at me i know exactly what the score is..If it`s a fox she`l try and push on and enter the earth or maybe scratch about the entrance your`ll learn and so will the dog mate but believe me a bark aint a good mark in my eyes......