To achieve a high-energy density the diet must be high in fat (ideally over 20 per cent in dry matter) and greater than 18 per cent protein. The feeding of all meat or 'home-kill' diets is deficient or marginal in many vitamins and minerals. Without bones meat is deficient in calcium.
Adding bones directly is playing a dangerous game for intestinal disasters, for example, bone fragments causing intestinal perforation, obstruction, constipation or colitis. Large bones that don't break up are good for teeth health.
Supplements of vitamins and minerals are best given to all meat diets or preferably flip it around and ensure no more than 30 per cent of the total diet can be meat.
Economically it is best to feed a dry diet rather than cans or dog rolls. Basically you are paying for water. Dry foods contain three to four times the nutrient densities required over wet foods. Stick to international brands of manufacturer that certify a feed is AFFCO-tested via a feeding trial of their product. It should be alongside the nutrient label.
Other nutrition-related diseases seen in working dogs include poor healing skin, bone weakness-resulting in susceptibility to fractures, joint problems causing lameness and poor immune function-leading to vulnerability to infections.
Recent research at Massey University has shown a low-carbohydrate, high protein diet appears to offer advantages to working dogs. Better nutrient digestibility, slower release of glucose into the bloodstream (low glycaemic index is better for stamina) and reduced intestinal fermentation of carbohydrate — in fact a predatory diet high in protein and fat!
The key is to feed this diet in small amounts (at least twice daily) and before exercise by at least an hour to minimise the likelihood of bloat.
The intelligence and learning of dogs has demonstrably improved through adequate nutrition in Marlborough studies as well.
Fuelling your faithful servant in that sense will have a huge payback benefit that could ultimately replace you.