# The Feeding Stuffs Regulations 1988, Part A: COMPOUND FEEDING STUFFS AND COMPOUND PET FOODS EXCEPT THOSE FOR DOGS OR CATS


Analytical constituents
Limits of variation (absolute value in percentage by weight, except where otherwise specified)
Ash
If present in excess—
2 for declarations of 10% or more
20% of the amount stated for declarations of 5% or more but less than 10%
1 for declarations less than 5%
In case of deficiency—
3 for declarations of 10% or more
30% of the amount stated for declarations of 5% or more but less than 10%
1.5 for declarations less than 5%
Calcium
If present in excess—
3.6 for declarations of 16% or more
22.5% of the amount stated for declarations of 12% or more but less than 16%
2.7 for declarations of 6% or more but less than 12%
45% of the amount stated for declarations of 1% or more but less than 6%
0.45 for declarations less than 1%
In case of deficiency—
1.2 for declarations of 16% or more
7.5% of the amount stated for declarations of 12% or more but less than 16%
0.9 for declarations of 6% or more but less than 12%
15% of the amount stated for declarations of 1% or more but less than 6%
0.15 for declarations less than 1%
Cystine
In case of deficiency—
20% of the amount stated
Fibre
If present in excess—
1.8 for all declarations
In case of deficiency—
45% of the amount stated
Lysine
In case of deficiency—
15% of the amount stated
Magnesium
If present in excess—
4.5 for declarations of 15% or more
30% of the amount stated for declarations of 7.5% or more but less than 15%
2.25 for declarations of 5% or more but less than 7.5%
45% of the amount stated for declarations of 0.7% or more but less than 5%
0.3 for declarations less than 0.7%
In case of deficiency—
1.5 for declarations of 15% or more
10% of the amount stated for declarations of 7.5% or more but less than 15%
0.75 for declarations of 5% or more but less than 7.5%
15% of the amount stated for declarations of 0.7% or more but less than 5%
0.1 for declarations less than 0.7%
Methionine
In case of deficiency—
15% of the amount stated
Moisture
If present in excess—
1 for declarations of 10% or more
10% of the amount stated for declarations of 5% or more but less than 10%
0.5 for declarations less than 5%
Oil
If present in excess—
3 for declarations of 15% or more
20% of the amount stated for declarations of 8% or more but less than 15%
1.6 for declarations less than 8%
In case of deficiency—
1.5 for declarations of 15% or more
10% of the amount stated for declarations of 8% or more but less than 15%
0.8 for declarations less than 8%
Phosphorus
If present in excess—
3.6 for declarations of 16% or more
22.5% of the amount stated for declarations of 12% or more but less than 16%
2.7 for declarations of 6% or more but less than 12%
45% of the amount stated for declarations of 1% or more but less than 6%
0.45 for declarations less than 1%
In case of deficiency—
1.2 for declarations of 16% or more
7.5% of the amount stated for declarations of 12% or more but less than 16%
0.9 for declarations of 6% or more but less than 12%
15% of the amount stated for declarations of 1% or more but less than 6%
0.15 for declarations less than 1%
Protein
If present in excess—
4 for declarations of 20% or more
20% of the amount stated for declarations of 10% or more but less than 20%
2 for declarations less than 10%
In case of deficiency—
2 for declarations of 20% or more
10% of the amount stated for declarations of 10% or more but less than 20%
1 for declarations less than 10%
Protein equivalent of biuret
±1.25, or ±20% of the amount stated, whichever is the greater
Protein equivalent of diureidoiso-butane
±1.25, or ±20% of the amount stated, whichever is the greater
Protein equivalent of urea
±1.25, or ±20% of the amount stated, whichever is the greater
Protein equivalent of urea phosphate
±1.25, or ±20% of the amount stated, whichever is the greater
Sodium
If present in excess—
4.5 for declarations of 15% or more
30% of the amount stated for declarations of 7.5% or more but less than 15%
2.25 for declarations of 5% of more but less than 7.5%
45% of the amount stated for declarations of 0.7% or more but less than 5%
0.3 for declarations less than 0.7%
In case of deficiency—
1.5 for declarations of 15% or more
10% of the amount stated for declarations of 7.5% or more but less than 15%
0.75 for declarations of 5% or more but less than 7.5%
15% of the amount stated for declarations of 0.7% or more but less than 5%
0.1 for declarations less than 0.7%
Protein soluble in pepsin and hydrochloric acid
In case of deficiency—
3 for declarations of 25% or more
12% of the amount stated for declarations of 15% or more but less than 25%
1.8 for declarations less than 15%
Starch and total sugar plus starch
If present in excess—
5 for declarations of 25% or more
20% of the amount stated for declarations of 10% or more but less than 25%
2 for declarations less than 10%
In case of deficiency—
2.5 for declarations of 25% or more
10% of the amount stated for declarations of 10% or more but less than 25%
1 for declarations less than 10%
Total sugar expressed as sucrose
If present in excess—
4 for declarations of 20% or more
20% of the amount stated for declarations of 10% or more but less than 20%
2 for declarations less than 10%
In case of deficiency—
2 for declarations of 20% or more
10% of the amount stated for declarations of 10% or more but less than 20%
1 for declarations less than 10%

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Source: https://www.legislation.gov.uk/uksi/1988/396/schedule/3/part/A (the official version)
Page: https://openlegislation.uk/feeding-stuffs-regulations-1988/schedule-3/part-A
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.