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Bone dust as a supplement for animal feed: -


Bone dust originates from animal bones, which are heated to more than 500 C for a prolonged period of time (more than 40 hours). During this period all the water and organic matter are efficiently remove. The weight loss in the process is about 50%. The resulting “bone char” can be considered as “pure” minerals from the bone. It has very high content of Calcium and Phosphorus but also with a high content of trace minerals originating from the bones.


Compared with ordinary bone meal or minerals supplied from the mines there are several advantages for using this product as a mineral supplement to feeds:



  • Pathogens are effectively removed due to the high temperatures. This means that the product is safe from diseases like mad cow disease which are not removed by ordinary sterilization.
  • Bone char have a mineral content which is 40%-60% higher than ordinary
  • Bone char doesn’t rot even if yet so the shelve life is unlimited.
  • Mineral supplements originating from mining especially phosphate normally contains high amounts of fluoride, which can be harmful, bone char has low fluoride content.


Typical mineral content

Bone char

Bone meal

Calcium Carbonate

Di-Calcium Phosphate

Calcium Ca





Phosphorus P





Trace minerals






Bone char has proven to have the highest content of Calcium and Phosphorus and rich in trace minerals.


The dosage of bone char in the animal feed is independent on the type of animal and the production situation e.g. milking cows require more calcium and phosphate than non-milking cows.

The following rough guideline can be used:


Mammals: 500g per 70kg feed.

Birds: 1kg per 70kg of feed

Milking cows: 75-200g per cow per day depending on milk production.