| abstract |
Poultry feed premixes and finished poultry feeds which contain particles comprising a Vitamin D 3 metabolite and Vitamin D 3 in a weight ratio ranging from about 1:2.5 to about 1:125 are described. These premixes and feeds are useful for promoting egg shell strength and bone strength in older egg laying hens as well as to provide to such hens the usual benefits of Vitamin D 3 in a diet. The invention also relates to methods for improving egg shell strength in older egg laying hens which comprise administering to hens such particles. |