Effect of Vitamin D₃ and/or Zeolite Supplementation to Laying Hen Rations Added Microbial Phytase on Performance and Enterprise Income

Tanay Bilal, Ferhan Kaygisiz, Huseyin Eseceli and Aysen Altiner

Journal of Animal and Veterinary Advances 8 ( 5 ): 1013 - 1020 , 2009