At the risk of annoying others.....most Trappers around here have dogs (big buggers) and feed the 'roo tails and the occasional under sized carcase to their animals, the trick is to leave the hide on the tail as this ensures that the dog gets a good clean out for his gut and intestines (roughage), the dog also benefits from the cleaning and massaging of his teeth and gums....a side benefit is the dog always starts from the open end which ensures that there is no fly blown meat in the yard (the rest is conveniently packaged), the same applies to rabbit carcases....leave the hide and the head on (for the same reasons) after inspecting for hydatids and such.
Too much meat makes the dog sh!t stink and too much bone makes the sh!t hard and white....likewise too much dog nuts and processed food makes the faeces large, soft and generally unpleasant (makes a small dog turd look like a log).
The gentleman who suggested a broad selection of scraps, meat and such (and for working dogs, plenty of carbohydrates such as pasta and rice), supplemented by a modicum of dry food is on the right track.
Of course we could be wrong.