Table 2. The concordance rate of sex identification results between vent-sexing and feather-sexing method

Farms	Vent-sexing			Feather-sexing			Matching rate b/w vent- and feather-sexing
	Male	Female	Total	Male	Female	Total
G farm	99	101	200	82	118	200	91.5%
C farm	98	102	200	85	115	200	93.5%
K farm	98	102	200	86	114	200	94.0%
HH farm	98	102	200	83	117	200	92.5%
HR farm	98	102	200	86	114	200	94.0%
Total	491	509	1,000	422	578	1,000	93.1%