Table 3.

Dry matter basis micromineral content [least square mean (95% confidence interval)] of thermally processed canned pet food¹ containing different copper sources at minimum levels to meet AAFCO² recommendations.

Micromineral, %3	NC	CG6	CG12	CA6	CA12	CS6	CS12	P-value
Calcium	0.52bc (0.44,0.61)	0.42d (0.34,0.50)	0.73a (0.64,0.81)	0.45cd (0.40,0.54)	0.61b (0.53,0.70)	0.47cd (0.38,0.55)	0.51cd (0.42,0.59)	0.0004
Phosphorus	0.52bcd (0.48,0.57)	0.48d (0.43,0.52)	0.63a (0.58,0.68)	0.49cd (0.45,0.54)	0.57b (0.53,0.62)	0.51cd (0.46,0.55)	0.53bc (0.49,0.58)	0.0004
Potassium	1.88 (1.76,2.00)	1.91 (1.79,2.03)	1.91 (1.79,2.04)	1.97 (1.85,2.09)	2.03 (1.90,2.15)	1.93 (1.81,2.06)	2.05 (1.93,2.17)	0.3409
Sodium	0.26 (0.22,0.29)	0.29 (0.26,0.33)	0.27 (0.23,0.30)	0.25 (0.22,0.29)	0.27 (0.23,0.30)	0.25 (0.22,0.28)	0.27 (0.23,0.30)	0.4905
Magnesium	0.09 (0.07,0.12)	0.08 (0.06,0.10)	0.09 (0.07,0.12)	0.10 (0.07,0.12)	0.08 (0.06,0.11)	0.09 (0.07,0.12)	0.08 (0.06,0.11)	0.8189
Sulfur	0.62 (0.58,0.66)	0.61 (0.57,0.65)	0.63 (0.59,0.67)	0.63 (0.59,0.68)	0.63 (0.59,0.67)	0.63 (0.58,0.67)	0.65 (0.60,0.69)	0.9031

Least square means within the same row that do not share a common superscript are different (P < 0.05).

NC = no added copper source; CG6 = 6 mg/kg dry matter (DM) of added copper from copper glutamate; CG12 = 12 mg/kg DM of added copper from copper glutamate; CA6 = 6 mg/kg DM of added copper from copper amino acid complex; CA12 = 12 mg/kg DM of added copper from copper amino acid complex; CS6 = 6 mg/kg DM of added copper from copper sulfate; CS12 = 12 mg/kg DM of added copper from copper sulfate.

AAFCO = Association of American Feed Control Officials.

Three replicates per treatment.