Companion Animal Grief: How Pets Mourn

Dogs, cats, and other companion animals show behavioral changes consistent with grief following the loss of a bonded companion, requiring owner awareness and appropriate support.

Key Facts

Studies in dogs show behavioral changes including reduced appetite, increased vocalization, and altered sleep after companion loss
Cats show similar grief responses: searching behavior, reduced play, and increased clinginess
Some companion animals show grief responses lasting weeks to months
Allowing surviving animals to briefly investigate a deceased companion may reduce searching behavior
Introducing a new companion too rapidly can increase stress rather than relieve grief

Welfare Considerations

The grief responses observed in companion animals following loss of bonded companions are consistent with the emotional complexity that welfare science increasingly recognizes in mammals. Owners who dismiss these responses as mere behavioral changes miss opportunities to provide appropriate support. Maintaining routine, providing additional interaction, and allowing animals time to process loss are appropriate responses. The decision about when or whether to introduce a new companion should be guided by behavioral readiness of the surviving animal rather than owner desire for a replacement — a distinction that reflects genuine consideration for animal emotional states.

What You Can Do

Maintain normal routines for surviving pets after loss of a companion to provide stability
Provide additional attention and contact during the grief period without forcing interaction
Consult a veterinarian if grief responses persist beyond several weeks or affect physical health
Allow surviving animals to set the pace for accepting a new companion — watch for readiness signals