Do domestic pigs in controlled environments contrafreeload?
(2003)
Journal Article
Young, R., & Lawrence, A. (2003). Do domestic pigs in controlled environments contrafreeload?. Journal of Applied Animal Welfare Science, 6(4), 309-318. https://doi.org/10.1207/s15327604jaws0604_5
Many experiments report that animals will work (lever press) for food in the presence of freely available identical food. This phenomenon has attracted the attention of applied ethologists because it seems to prove that animals have a need to express... Read More about Do domestic pigs in controlled environments contrafreeload?.