Mutual participation of veterinary staff and clients is necessary for effective communication in clinical practice situations. The purpose of this study was to verify whether the current status of communication in the examination room of a small animal hospital could be evaluated quantitatively using the Rotor Interaction Analysis System (RIAS). RIAS was applied to 12 randomly selected cases from 59 recorded consultations with staff from an endocrinology unit of a veterinary teaching hospital in Tokyo, Japan. Two certified coders carried out the analyses according to the RIAS format; six relevant categories were added, including utterances to pets and colleagues and utterances related to dietary management, which is essential in managing endocrinology diseases like diabetes. Then, the frequency of utterances in each category was compared between veterinary staff and clients. The results demonstrated that the mean consultation length of the 12 interviews was 10 min 6 sec. Inter-coder reliability (Spearman's ρ=0.828, P<0.01) was high. There were 16 categories with an average of over one utterance per consultation. Frequent categories were "Backchannel responses," "Paraphrase/checks for understanding," and "Transition words" for veterinary staff, while for clients, "Shows agreement or understanding" and "Gives information of dietary activities" were common. The study results, although limited because only one consultation department was included, are consistent with the structure of actual clinical conversations and are considered valid. The usefulness of RIAS has been verified, allowing for this method to be used in diverse studies on veterinary communication in the future.