Download Hydrolysed feather protein 1212F

Digestibility trial with Mink (Neovison vison)
Hydrolysed Feather protein (1212F)
Report on the digestibility of hydrolysed feather protein. The trial was ordered and
paid by Sonac BV, P.O. Box 47, 5690 AA Son, The Netherlands. The purpose of
the trial was to measure the apparent mink digestibility of crude protein (CP) and
amino acids in hydrolysed feather protein.
Material and method
The sample of hydrolysed feather protein (standard) was received on 7 February
2012 from Sonac Son.
The trial was conducted as a regression design, consisting of 4 groups with three
animals in each group. Adult male mink of the colour type Brown/Glow were used.
The diet 1 to 4 contained increasing quantities of hydrolysed feather protein (table
1). Crude protein from hydrolysed feather protein made up from 0 % to 55.5 % of
the total dietary crude protein. Crude fat from hydrolysed feather protein made up
from 0% to 10.6 % of the total dietary crude fat content.
Table 1. Formula for diet 1 and 4 (% before addition of water)
Feed ingredients
Diet 1
Diet 4
Hydro. Feather meal (std.)
0.0
14.5
Cod filet
80.6
57.6
Soya bean oil
8.5
10.8
Corn starch
8.6
11.7
Glucose
1.0
1.4
Cellulose
0.5
2.8
Vitamin mix
0.4
0.5
Mineral mix
0.5
0.6
The trial consisted of 7 days preliminary period and 4 days faecal collection period.
Diet allowance was 300 kcal metabolizable energy (ME) per day the first 6 days,
and 250 kcal ME the last 5 days.
The trial was conducted in the period from 27 February to 9 March 2012.
The test ingredient, the diets and faeces were analysed by Danish Fur Animals
Feed a.m.b.a., the Analysis Laboratory.
Results
Chemical composition
The chemical composition of the hydrolysed feather protein is presented in table 2.
The content of dry matter 95.5 %, crude protein 89.4 %, crude fat 8.8 % and crude
ash 2.1 % are in range with the product specification (96.2 %, 89.8 %, 7.2 % and
2.2 %).
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Feather protein for mink. Digestibility trial 1212F performed by Kopenhagen Farm
Table 2. Chemical composition and apparent digestibility in hydrolysed feather protein (1212F). (Mean ± SEM)
Composition
Digestibility, %
SEM
Dry matter, %
96.5
Percent of dry matter
Crude protein (CP=N*6,25)
89.4
55
1.6
Crude fat
8.8
82
5.0
Crude ash
2.1
In vitro digestibility, crude protein
91
Amino acid, % of CP
4.85
Alanine
67
1.3
7.31
76
0.7
Arginine
Aspartic acid
6.79
2.6
24
3.47
36
1.6
Cystine
Glutamic acid
11.08
53
1.2
8.17
1.0
65
Glycine
Histidine
0.63
3.7
34
Isoleucine
5.10
1.0
76
8.21
72
1.0
Leucine
2.11
2.6
Lysine
43
0.58
2.8
54
Methionine
Phenylalanine
5.04
1.4
76
11.12
1.2
Proline
57
12.51
0.9
64
Serine
4.86
2.4
Threonine
48
0.62
4.5
40
Tryptophan
Tyrosine
2.91
61
3.4
Valine
8.18
71
0.8
Feed intake and faeces consistency
Feed intake and consistency of faeces were satisfactory in all groups.
Digestibility
In the tested hydrolysed feather protein standard, the apparent digestibility of crude
protein was 55 % (table 2), while the true digestibility was 59 %. In vitro digestibility
of crude protein was 91 %.
The digestibility of crude fat was 82 %.
Digestibility of amino acids for hydrolysed feather protein is presented in table 2.
The relatively high SEM value on tryptophan digestibility should be compared to the
relatively low content in the test product.
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13/09/2012
Louise Tinggaard
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Feather protein for mink. Digestibility trial 1212F performed by Kopenhagen Farm