Knowing a dogs trashing

You just gotta know your dog is the main thing.
This time of year it's real simple to trash break off deer.
Go to the deer processing place and ask em to save you a couple of glands off the deer back legs. At my place I have a electric fence so the goats keep their heads outta the fence so I will go around and wire those glands to the electric fence then I'll let my pups run around out in the pasture they will wind the strong smell of the glands and go investigate when they find the glands they will smell of it sometimes bite it and the fence will lite their butts up. Then when you take em to the big woods they smell a deer they are goin the other direction in a hurry.