Table 3
Effects of dietary copper on quality of skins in growing-furring mink

Treatments		Overall quality (score)	Colour intensity (score)	Silkiness (score)	Underfur hairs per mm2 skin	Leather thickness (mm)
Control		7.72	2.30	2.85	241.2	0.77
Cu6		7.95	2.32	3.10	245.2	0.73
Cu12		7.96	3.00	2.91	239.0	0.69
Cu24		9.13	3.17	3.19	247.4	0.73
Cu48		8.66	3.02	3.32	250.9	0.84
Cu96		8.78	2.98	2.66	247.7	0.89
Cu192		8.67	3.17	3.00	247.0	0.89
SEM		0.11	0.10	0.10	1.49	0.01
p value	Linear	0.026	0.057	0.738	0.279	0.982
	Quad	0.012	0.186	0.894	0.157	0.350