# The Welfare of Farmed Animals (England) Regulations 2007, Paragraph 12: Floors


(1) Where concrete slatted floors are used for pigs kept in groups, the maximum width of the openings must be—
(a) 11 mm for piglets;
(b) 14 mm for weaners;
(c) 18 mm for rearing pigs; and
(d) 20 mm for gilts after service and sows.
(2) The minimum slat width must be—
(a) 50 mm for piglets and weaners; and
(b) 80 mm for rearing pigs, gilts after service and sows.

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Source: https://www.legislation.gov.uk/ukdsi/2007/9780110773612/schedule/8/paragraph/12 (the official version)
Page: https://openlegislation.uk/draft-welfare-of-farmed-animals-england-regulations-2007/schedule-8/paragraph-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.