Poultry Bulletin 

 RESULTING CHICK MORTALITY 



11 



Following the fall experiment on Nov. 26 the 408 chicks from yeast fed 

 breeders were divided about equally between six Newtown coal burning 

 stoves and 148 of the chicks from non-yeast fed breeders were about 

 equally divided between the same stoves. The capacity of these six stoves 

 being brought up to about 250 chicks each by the addition of other chicks 

 hatched at the same time. At the end of three weeks some very definite 

 figures were secured on chick mortality. The following table No. 5 shows 

 the total mortality resulting from these six brooder pens. 



From the six brooder pens above mentioned at three weeks of age it 

 will be observed that at the end of the 21st day in the brooder nineteen 

 chicks from the non-yeast fed breeders had died out of the 148 chicks 

 originally placed in the brooders. It will also be observed that 22 yeast 

 fed chicks had died up to that age out of the 408 chicks originally placed 

 in the brooders. This means that 5.4% of the chicks resulting from yeast 

 fed breeders had died at the age of three weeks, while 12.8%ofthechicks 

 from the non-yeast fed breeders had died in the same period. 



The results of this particular experiment show, therefore, a mortality 

 at three weeks of more than double the number of chicks from the non- 

 yeast fed breeders over the yeast-fed breeders. In analyzing the results 

 of this second experiment it must be appreciated that it was work done 

 outside of the normal breeding season, the breeding hens used for this 

 work were not in good breeding condition having been forced for heavy 



