Limitations to the fulfilment of ethological and physiological needs can cause countless negative effects on animal welfare and lead to the development of abnormal behaviours. From a very young age, pigs are strongly motivated to perform exploratory and foraging behaviour, even if they are provided with enough feed to satisfy their dietary needs [...].
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6826989 | PMC |
http://dx.doi.org/10.3390/ani9100721 | DOI Listing |
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