Experimental group

Characteristic of group

1) Control

Basic ration + vitamin D3

2) Rickets

Basic ration (vitamin D3 free)

3) Basic ration + CaCO3

Basic ration (vitamin D3 free); starting from the age of 14 days the chickens received per os calcium carbonate for two weeks (Са2+ 5 mg/day)

4) Basic ration + CaCO3 + D3

Basic ration (vitamin D3 free); starting from the age of 14 days the chickens received per os calcium carbonate for two weeks (Са2+ 5 mg/day) and cholecalciferol 0.25 µg/day

5) Basic ration + ACaSC*

Basic ration (vitamin D3 free); starting from the age of 14 days age the chickens received per os amorphous calcium salts for two weeks (Са2+ 5 mg/day)

6) Basic ration + ACaSC + D3

Basic (vitamin D3 free) ration; starting from the age of 14 days the chickens received per os amorphous calcium salts for two weeks (Са2+ 5 mg/day) and cholecalciferol 0.25 µg/day