Summary of Characters Indicating Suitability of Birds for 
Breeding Stock in Broiler Production 
MALES 
Desirable 
Indications of fast feathering as day- 
old chicks and at 10 days and 8 to 
12 weeks of age. 
Rapid growth at 4 to 6 weeks, 20 
weeks, and before birds are placed 
in breeding pens. 
A and B grades of breast development 
at 6 to 12 weeks of age. 
No defects. 
Undesirable 
Indications of slow feathering as day- 
old chicks and at 10 days and 8 to 
12 weeks of age. 
Medium or slow growth at 4 to 6 
weeks, 20 weeks, and before birds are 
placed in breeding pens. 
C and D grades of breast development 
at 6 to 12 weeks of age. 
Any defects. 
FEMALES 
Desirable 
Indications of fast feathering as day- 
old chicks and at 10 days and 8 to 12 
weeks of age. 
Rapid and medium growth at 4 to 6 
weeks, 20 weeks, and before birds 
are placed in breeding pens. 
A, B, and C grades of breast develop- 
ment at 6 to 12 weeks of age. 
No defects or slight defects. 
8 
Undesirable 
Indications of slow feathering as day- 
old chicks and at 10 days and 8 to 
12 weeks of age. 
Slow growth at 4 to 6 weeks, 20 weeks, 
and before the birds are placed in 
breeding pens. 
D grade of breast development at 6 
to 12 weeks of age. 
Serious defects. 
U. S. GOVERNMENT PRINTING OFFICE: 1943 
For sale by the Superintendent of Documents, U. S. Government Printing Office 
Washington, D. C. 
Price 5 cents 
