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. 2019 Feb 20;7:e5828. doi: 10.7717/peerj.5828

Table 1. Stable isotopic composition (expressed as ‰), C:N ratio, ether extract (%), and the median proportion of four main ingredients (poultry, beef, maize, and C3 grains) estimated by the MixSIAR of the dry dog foods produced by several companies.

id δ13C δ15N C:N EE Poultry Beef Maize C3 Grains
1 −24.2 2.6 10.6 14 0.41 0.01 0.09 0.48
2 −23.7 3.3 8.8 16 0.32 0.01 0.05 0.60
3 −23.1 3.4 9.6 16 0.39 0.01 0.05 0.54
4 −22.3 2.1 11.0 10 0.44 0.01 0.06 0.48
5 −21.6 2.3 14.9 – 0.41 0.01 0.11 0.46
6 −21.4 3.0 11.4 14 0.55 0.01 0.06 0.37
7 −21.3 2.8 7.9 18 0.61 0.01 0.05 0.33
8 −21.0 2.9 7.5 18 0.65 0.01 0.04 0.30
9 −21.0 2.3 9.2 18 0.61 0.01 0.06 0.33
10 −20.9 3.0 13.5 6 0.50 0.01 0.11 0.37
11 −20.1 3.3 8.2 18 0.73 0.01 0.05 0.21
12 −18.7 2.3 9.2 13 0.66 0.01 0.16 0.17
13 −18.7 2.3 9.2 13 0.66 0.01 0.16 0.17
14 −18.2 2.8 8.7 13 0.72 0.01 0.15 0.11
15 −18.2 2.8 8.7 14 0.72 0.01 0.16 0.11
16 −17.9 2.9 11.1 9 0.58 0.01 0.25 0.15
17 −17.9 2.9 11.1 9 0.58 0.01 0.25 0.15
18 −17.9 2.9 11.1 9 0.58 0.01 0.25 0.15
19 −17.9 2.9 11.1 9 0.58 0.01 0.25 0.15
20 −17.8 2.6 8.0 18 0.73 0.01 0.17 0.09
21 −17.8 2.6 8.5 – 0.74 0.01 0.22 0.03
22 −17.8 3.0 8.5 18 0.80 0.00 0.16 0.03
23 −17.8 2.0 9.8 14 0.74 0.00 0.21 0.04
24 −17.8 2.3 12.2 12 0.63 0.01 0.26 0.10
25 −17.8 2.5 11.0 18 0.70 0.01 0.23 0.07
26 −17.7 2.6 9.5 14 0.76 0.00 0.20 0.03
27 −17.4 3.7 12.1 9 0.65 0.01 0.27 0.07
28 −17.4 2.8 9.2 8 0.75 0.01 0.21 0.03
29 −17.2 2.3 10.0 18 0.71 0.00 0.25 0.03
30 −17.1 3.9 10.8 9 0.69 0.01 0.25 0.04
31 −17.0 3.0 11.2 7 0.67 0.01 0.28 0.04
32 −16.8 3.6 11.8 9 0.65 0.01 0.30 0.04
33 −16.8 2.1 9.4 16 0.69 0.00 0.28 0.02
34 −16.8 3.4 11.4 9 0.66 0.01 0.30 0.03
35 −16.6 2.7 11.0 18 0.65 0.01 0.31 0.03
36 −16.2 3.3 9.7 18 0.64 0.01 0.32 0.02
37 −16.2 3.3 9.7 18 0.64 0.01 0.32 0.02
38 −16.1 2.1 10.0 16 0.60 0.01 0.36 0.02
39 −15.9 2.5 8.4 18 0.60 0.01 0.36 0.02
40 −15.9 2.5 8.4 18 0.60 0.01 0.36 0.02
41 −15.9 2.5 8.4 18 0.54 0.09 0.37 0.00
42 −15.9 3.4 9.6 17 0.60 0.07 0.32 0.00
43 −15.6 3.4 9.2 17 0.57 0.08 0.33 0.00
44 −15.3 3.5 9.7 17 0.53 0.10 0.36 0.00
45 −15.2 2.7 10.2 9 0.51 0.05 0.42 0.00
46 −15.0 1.9 11.0 16 0.47 0.03 0.48 0.00
47 −14.7 2.7 9.4 18 0.45 0.07 0.46 0.00
48 −14.6 3.2 10.1 8 0.44 0.10 0.45 0.00
49 −14.6 3.2 10.1 8 0.44 0.11 0.44 0.00
50 −14.2 1.7 11.0 16 0.37 0.04 0.59 0.00
51 −14.1 3.0 9.8 14 0.38 0.11 0.50 0.00
52 −14.1 3.0 9.8 14 0.38 0.11 0.50 0.00
53 −13.6 3.3 12.7 6 0.30 0.12 0.57 0.00
54 −13.5 2.8 8.7 8 0.30 0.12 0.57 0.00
55 −13.5 3.4 10.1 8 0.30 0.19 0.50 0.00
56 −13.5 3.4 10.1 8 0.30 0.19 0.50 0.00
57 −13.5 3.4 10.1 8 0.30 0.19 0.50 0.00
58 −13.5 3.4 10.1 8 0.30 0.19 0.50 0.00
59 −13.5 3.4 10.1 8 0.30 0.19 0.50 0.00
60 −13.4 4.2 11.4 – 0.27 0.27 0.45 0.01
61 −12.8 2.8 10.8 12 0.20 0.12 0.67 0.00