To determine the best practices for providing good sow and litter welfare in the farrowing accommodation, a good starting point is to re-examine the behavioral patterns that have been documented around farrowing and during lactation, in a natural or semi-natural environment. There is a series of behaviors carried out, with sows and piglets undergoing various phases of isolation, community integration, and living. Jensen has proposed that maternal behavior can be divided into six distinct parts: (i) isolation and nest site seeking, (ii) nest building, (iii) farrowing, (iv) nest occupation, (v) social integration, and (vi) weaning .
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Johnson, Anna K. and Marchant-Forde, Jeremy N., "Natural Farrowing Behavior of the Sow and Piglets" (2010). Animal Science White Papers, Technical Reports, & Fact Sheets. 15.