Table 4.
Dry matter basis trace mineral and vitamin E content [least square mean (95% confidence interval)] of thermally processed canned pet food1 containing different copper sources at minimum levels to meet AAFCO2 recommendations.
| Nutrient, mg/kg3 | NC | CG6 | CG12 | CA6 | CA12 | CS6 | CS12 | P-value |
|---|---|---|---|---|---|---|---|---|
| Iron | 64.1 (58.6,69.7) | 65.5 (60.0,71.1) | 69.0 (63.5,74.6) | 66.0 (60.5,71.6) | 63.6 (58.0,69.2) | 63.9 (58.3,69.4) | 66.1 (60.6,71.7) | 0.3401 |
| Copper | 0.00c (−0.03,0.03) | 7.58b (6.73,8.49) | 14.09a (12.91,15.31) | 7.64b (6.78,8.55) | 14.12a (12.94,15.35) | 7.51b (6.66,8.41) | 14.32a (13.14,15.56) | <0.0001 |
| Manganese | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | NA4 |
| Zinc | 34.9 (32.3,37.4) | 32.9 (30.4,35.4) | 38.3 (35.8,40.8) | 34.3 (31.8,36.8) | 33.2 (30.3,35.3) | 33.8 (31.2,36.3) | 32.8 (30.3,35.3) | 0.0623 |
| Vitamin E | 112.72a (101.07,124.37) | 94.47b (82.81,106.12) | 92.67b (81.02,104.32) | 76.07c (64.42,87.72) | 91.84bc (80.12,103.49) | 92.95b (81.30,104.60) | 111.06a (99.41,122.71) | 0.0104 |
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.
NA = not applicable due to values below detection limits.