Despite the thought of eating ox kidney or any other type of offal has fallen out of favour with people we give it to our dogs.

As some types of commercial dog food use it as an ingredient. As kidneys as a food are a nutritional powerhouse and an ox kidney contains:

Sodium (170mg), potassium (240mg), magnesium (16mg), calcium (11mg), and phosphorus (240mg). The food also has 7.2mg of Iron, 0.48mg of copper, 1.9mg zinc, 300mg of chloride, and 0.11mg of manganese, 150 of selenium, 15 of iodine, 105 of Vitamin A, a Trace of the D Vitamin, 0.55 of Vitamin E, 0.5 mg of thiamine, 2.53mg of riboflavin, 6mg of niacin, 0.37mg of Vitamin B6, 15mg of Vitamin B12.

Ox kidneys also contain 63 of Folate and 8mg of Vitamin C and it is also a good type of meat for slow cooking as well.