58 
The Shepherd or Police Dog 
sex determination by breeding early or late, the 
formula as it is usually understood is that early 
breeding would result in a predominance of females, 
while a late breeding would produce a greater num¬ 
ber of males. I have observed this closely among 
my own dogs for years and the results have not 
proved the contention. I found, however, that the 
early breeding tended toward more misses, so now 
I breed mv bitches at the time that they seem most 
receptive, regardless of the time of the season, and I 
still find the same ratio in the sexes. 
