A Case of Animal Hoarding and Neglect in Bangkok, Thailand: Application of the TRACE Model in Veterinary Forensic Investigation

Background and Clinical Significance: Animal hoarding is a recognized form of animal cruelty characterized by the accumulation of animals under conditions of inadequate care, leading to compromised welfare and an increased risk of disease transmission. Veterinarians are often the first to identify such cases through clinical presentation. This case report describes a forensic investigation of a dog associated with animal hoarding and environmental neglect in Bangkok, Thailand. Case Presentation: A 7-year-old male mixed-breed dog was presented with seizures, emaciation, dehydration, and ectoparasite infestation. Hematological findings revealed leukopenia and anemia, and diagnostic testing confirmed infection with canine distemper virus (CDV) and Dirofilaria immitis. Despite supportive treatment, the dog died within 48 h. A subsequent site inspection, conducted using the TRACE model and based on crime scene investigation principles, identified 13 dogs housed in overcrowded and unsanitary conditions. Environmental assessment revealed poor sanitation, waste accumulation, and fluorescent stains of unknown origin detected under ultraviolet light (365 nm) in the cage areas. Among the animals, infections with CDV (23.08%), Dirofilaria immitis (53.85%), and Ehrlichia canis (61.54%) were identified, indicating a high burden of infectious and vector-borne diseases. Conclusions: This case demonstrates the value of integrating clinical veterinary findings with forensic investigation in the assessment of animal neglect. The combined use of clinical, laboratory, and environmental evidence strengthens documentation and supports potential legal action. Enhanced veterinary forensic training and standardized protocols are recommended to improve early detection and intervention in animal cruelty cases.