|Better Farming Series 13 - Keeping Chickens (FAO - INADES, 1977, 48 p.)|
|How poultry make use of food and water|
52. In 10 kilogrammes of feed, there should be 200 grammes of mineral salts.
Bones, oyster and snail shells, and egg shells are rich in mineral salts.
If you do not give mineral salts, poultry cannot grow well; their bones will be small and badly formed.