We can supply three kinds of zinc: zinc oxide, zinc sulfate and organic zinc. 

Zinc is a trace element that is necessary for normal growth and maintenance and includes among other functions bone development, feathering, enzyme structure and function, and appetite regulation for all species. Zinc is necessary for many biochemical and cellular process in animals. The execution of cell proliferation and regeneration by joining to structure of cellular enzymes, the development of immune system, productivity, gene regulation, the processing of defensive mechanism against oxidative stres and damages are known as some important functions of zinc.