What the bone and organ shares in 80/10/10 are doing

Eighty percent muscle meat, ten percent raw edible bone, ten percent organ, half of that liver. The ratio is repeated so consistently across raw feeding that it reads like a law of nature.

It is actually a rough reconstruction of what a whole prey animal is made of, and each share is standing in for something specific. Knowing which is which is what lets you tell a feeding problem from a recipe problem.

The bone is calcium, and it is not optional

Muscle meat is high in phosphorus and low in calcium. On its own it gives a calcium to phosphorus ratio badly skewed in the wrong direction, and a growing dog fed that way develops skeletal problems.

Bone is what corrects it. The ten percent edible bone brings the ratio back into the range a dog needs, which is roughly in the region of 1.2 to 1 calcium to phosphorus for an adult.

This is the part of the diet with the least room to improvise. Too little bone and the balance fails quietly, over months, which is the dangerous direction because nothing looks wrong until it does. Too much and it shows up within days as hard, white, crumbly stool and a dog straining, which is uncomfortable but self-correcting once the ratio comes back.

Edible bone is not the same as a weight of bone

The ten percent means bone the dog actually consumes. A chicken wing is roughly half bone by weight, so feeding 100 g of wing contributes about 50 g of bone, not 100.

A recreational bone that gets gnawed and left is not part of the ration at all. Counting it as though it were is the usual route to an underfed calcium share, and counting a bone-in cut as pure bone is the usual route to an overfed one.

The raw dog food calculator splits the daily total into the three shares in grams, which is the practical form for this, because you are weighing out cuts rather than calculating percentages at the counter.

Liver is a vitamin dose, not a meat

The five percent liver is there for vitamin A, copper, iron and B vitamins, at concentrations nothing else in the bowl comes close to.

That density is exactly why it is capped. Vitamin A is fat soluble, so it accumulates rather than being flushed, and a long-term excess is a real problem rather than a theoretical one. Liver also has an immediate and unmistakable effect on stool when it is overdone.

The other five percent, usually kidney, spleen or pancreas, covers nutrients liver is weaker on. Feeding ten percent liver and no other organ is a common shortcut and it is the wrong one, because it doubles the thing with a ceiling and skips the thing without one.

Stool is the diagnostic

Raw feeders learn to read stool because it responds within a day, and it points fairly reliably at which share is off.

Hard, pale and crumbly means too much bone. Loose and dark usually means too much organ, and liver first. Consistently soft without either extreme often means the fat content is high rather than the ratio being wrong, which is a different adjustment.

The useful discipline is to change one share at a time and give it three or four days. Changing two at once teaches you nothing, which is the same problem as introducing five proteins at once.

Where the ratio stops being enough

The 80/10/10 model is a reasonable approximation for a healthy adult dog over time. It is explicitly an approximation.

Puppies, pregnant or nursing dogs, and dogs with kidney, liver or pancreatic conditions all need something considered rather than something averaged. Long-term single-protein feeding can also leave gaps the ratio does not see, which is the argument for rotating proteins rather than settling on the one the dog likes best.

If any of those apply, the right move is a vet or a qualified canine nutritionist, with the calculator used to hit whatever targets they set rather than to decide them.