People are still pet crazy, and they increasingly prefer shopping online. Chewy operates in the overlap of both markets.It's been a tough past three years for Chewy (CHWY 0.04%) shareholders. After soaring during the early days of the pandemic, Chewy shares have since fallen more than 80% from their early 2021 peak. Even with their recent strength, shares remain 79% below that high.As the adage goes, though, past performance is no guarantee of future results. Interested investors might want to dive into thi ...