Sl. Davis et Pr. Cheeke, DO DOMESTIC-ANIMALS HAVE MINDS AND THE ABILITY TO THINK - A PROVISIONAL SAMPLE OF OPINIONS ON THE QUESTION, Journal of animal science, 76(8), 1998, pp. 2072-2079
Faculty, staff, and graduate students in a number of departments, stud
ents in an undergraduate course, and some groups outside the universit
y were polled to obtain their perceptions about whether domestic anima
ls have minds, the ability to think, and differing degrees of intellig
ence (the surveys focused only on horses, cows, sheep, dogs, chickens,
pigs, cats, and turkeys). A clear majority of all groups surveyed (ex
cept the Department of Zoology) said yes, they believe animals have mi
nds, but a substantial number of those in animal sciences and zoology.
(17 to 25%) said no. A number of others in animal sciences, zoology, a
nd philosophy (11 to 37%) refused to answer the question because the c
oncept of mind was not defined. From 80 to 100% of respondents in othe
r groups said yes to the question of minds. From 67 to 100% of all par
ticipants said yes, they perceive that animals have the ability to thi
nk, but a substantial number of animal scientists, zoologists, veterin
arians, and English faculty said no, animals don't think (6 to 33%). O
n the question Do domestic animals differ in relative intelligence?, t
he responses varied from 88% in animal sciences to 100%. Surprisingly,
when asked to rank different animal species by intelligence, there wa
s a remarkable degree of similarity across all groups regardless of ba
ckground; the overall ranking from highest intelligence to lowest was
dog, cat, pig, horse, cow, sheep, chicken, and turkey. Most of the res
pondents believed that the possession of minds, thought, and intellige
nce were relevant factors in how animals should be treated and the pre
valent concept was that we should not be cruel to animals, but should
treat them humanely.