# The Welfare of Farmed Animals (England) Regulations 2007, Paragraph 21


(1) Subject to sub-paragraph (2), the minimum unobstructed floor area for a boar must be 6 m².
(2) When boar pens are also used for natural service, the floor area must be at least 10 m² and must be free of any obstacles.

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Source: https://www.legislation.gov.uk/ukdsi/2007/9780110773612/schedule/8/paragraph/21 (the official version)
Page: https://openlegislation.uk/draft-welfare-of-farmed-animals-england-regulations-2007/schedule-8/paragraph-21
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.