This study categorized online shopping malls for pet products that grew during the COVID-19 pandemic into professional and comprehensive malls, and applied the PPM (Push-Pull-Mooring) migration theory framework to empirically compare the factors influencing user behavioral intentions by mall type. Additionally, by examining the differences in post-purchase behavioral intentions between users of professional and comprehensive malls, this study aimed to gain an in-depth understanding of changes in consumer behavior in the online retail market. For the empirical analysis, surveys were conducted separately for each mall type, and a structural equation model was utilized to verify the effects of variables such as perceived usefulness, service dissatisfaction, user resistance, and switching costs on experience-based satisfaction, decision quality, switching intention, and repurchase intention. Based on the research findings, practical implications for online shopping mall operators to establish differentiated strategies were provided, and strategies to understand and respond to the rapidly changing consumer behavior during the pandemic were presented. Furthermore, this study is expected to contribute to the formulation of strategies that effectively respond to market changes and meet consumer demands and expectations. It also suggested new research directions in related fields through an in-depth analysis of online shopping mall types.