# Directive 2010/63/EU of the European Parliament and of the Council of 22 September 2010 on the protection of animals used for scientific purposes (Text with EEA relevance), Division Table 1.1: Mice

Extent: E+W+S+N.I.

Post-weaned mice may be kept at these higher stocking densities for the short period after weaning until issue, provided that the animals are housed in larger enclosures with adequate enrichment, and these housing conditions do not cause any welfare deficit such as increased levels of aggression, morbidity or mortality, stereotypes and other behavioural deficits, weight loss, or other physiological or behavioural stress responses.
Body weight(g)
Minimum enclosure size(cm2)
Floor area per animal(cm2)
Minimum enclosure height(cm)
Date referred to in Article 33(2)
In stock and during procedures
up to 20
330
60
12
1 January 2017
over 20 to 25
330
70
12
over 25 to 30
330
80
12
over 30
330
100
12
Breeding
330
For a monogamous pair (outbred/inbred) or a trio (inbred). For each additional female plus litter 180 cm2 shall be added.
12
Stock at breedersEnclosure size950 cm2
less than 20
950
40
12
Enclosure size1 500 cm2
less than 20
1 500
30
12

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Source: https://www.legislation.gov.uk/eudr/2010/63/annex/III/section/B/division/1/division/Table (the official version)
Page: https://openlegislation.uk/eu-directive-2010-63/annex-III/section-B/division-1/division-Table
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.