How animals grieve the loss of companion animals and human family members, welfare implications, and evidence-based support strategies for grieving pets.
Animal grief is no longer scientifically controversial — behavioral and physiological evidence across multiple species demonstrates that social animals experience responses to companion loss that parallel human grief in functional terms. Companion animals sharing households may form strong bonds with other animals or humans that, when severed by death, produce genuine behavioral distress. This distress has welfare implications: animals experiencing grief-related behavioral changes may have reduced appetite, disrupted sleep, increased anxiety, and reduced positive behavioral indicators. Supporting grieving companion animals involves practical strategies: maintaining routine where possible, providing additional social interaction and engagement, allowing access to familiar scents of the deceased, and monitoring for prolonged or severe responses that might benefit from veterinary attention. For multi-animal households experiencing bereavement, the timing and manner of introducing a new animal should consider both the owner's grief and the surviving animal's adjustment process — some animals benefit from new companionship relatively quickly while others need longer adjustment time before social reintegration.