This paper is concerned with the interpretation of the behavior of dog
s in mentalistic or psychological terms, and questions whether previou
s experience with pets influences the extent to which such terminology
is used. Forty undergraduate psychology students viewed and produced
written descriptions of five videotaped episodes showing dogs interact
ing with their owners, Twenty of the students had had at least two yea
rs of experience with a dog or cat as a family pet before the age-of e
ighteen. These participants produced significantly more descriptions o
f the dogs' behavior in terms of desires, feelings and understanding t
han did those with little or no experience of pets. Though the videota
ped episodes varied in the extent to which they evoked psychological d
escriptions, and the different types of psychological description vari
ed in frequency, these factors did not interact significantly with pre
vious pet experience. The results are discussed in terms of the influe
nce of living with companion animals on the way in which such animals
are perceived and understood.