ABSTRACTThis study re-evaluated the Companion Animal Bonding Scale (Poresky, Hendrix, Mosier and Samuelson 1987) using a wide range of developmental levels. Participants included 714 individuals (284 boys and 430 girls) from fourth grade to undergraduate college status. The elementary, middle, and high school students were enrolled in a public school system in a large metropolitan area and the college students were enrolled in a medium size state university. The sample included 600 Caucasians and 114 members of other ethnic groups. Only responses from current pet owners (n=610) were included in data analysis. Analysis of the Companion Animal Bonding Scale revealed three factors related to human-animal attachment: (1) emotional bond/affectional tie, (2) physical proximity, and (3) caretaking. The caretaking factor found in this study differs from the third factor (animal responsiveness and autonomy) reported by Poresky et al. (1987). The three factors in this study also differ somewhat from those reported by Poresky (1997). The results of this study are discussed within the context of attachment theory.