After the elderly person and their pet dog returned to the community from the quarantine center, they were subjected to forced disinfection, with no prior warning about the risks or the ingredients of the disinfectant. The dog was placed on the ground for disinfection, and within 15-20 minutes after the disinfection, the dog lost consciousness and passed away. It was only after the dog’s death and the owner’s persistent inquiries that the staff revealed the disinfectant used: trichloroisocyanuric acid disinfectant tablets.