Palmer, Clare and Sandøe, Peter (2019) Yes, sheep are smart but the moral question is still “can they suffer?”. Animal Sentience 25(24)
Lori Marino and Debra Merskin, Intelligence, complexity, and individuality in sheep
Sheep may be more complex and intelligent than we traditionally believed, but knowing this is unlikely to change human attitudes to sheep significantly; nor is it strongly relevant to their moral status. However, knowing more about what sheep are like could help to improve sheep welfare.