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Do cats grieve when another animal in the house dies?

As we grieve the loss of a pet, we may not be the only ones feeling the pain.
Research is showing that cats who are left behind when another animal in their home dies could be mourning along with us.
Grief is a well-documented human response to loss – but its roots may be far more ancient as some scientists believe it evolved in extinct species of humans.
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Corvids – members of the crow family – primates, and marine mammals like dolphins and whales, have all been observed to change their behaviour when one of their own dies, from carrying dead offspring for days, to staying close by the body, as if keeping vigil.
One theory is that grief is a by-product of the natural stress response to separation seen in social animals. According to this idea, distress and searching behaviour probably evolved to encourage animals to reunite with lost group members, which was beneficial for survival. These responses persist when separation is permanent, like in death, leading to the enduring pain of grief.
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While there’s plenty of research on how losing a pet affects humans, much less is known about how cats cope with loss, something recent research by US-based comparative psychologists Brittany Greene and Jennifer Vonk investigated.
Unlike typical social species, the cat’s wild ancestor was largely solitary. However, domestication has reshaped their behaviour, enabling them to live in groups and form social bonds.
Green and Vonk’s study suggests that cats can grieve the loss of a fellow pet. In their study of 452 cats, many displayed signs of distress, such as increased attention-seeking, vocalising and reduced appetite, following the death of a companion. The study found that the strength of the bond between the animals, their time spent together, and daily interactions were key factors in this grief-like behaviour.
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This study builds on earlier research by animal welfare researcher Jessica Walker and her team in 2016, which examined how cats and dogs react to the loss of a companion. Walker’s study, conducted in New Zealand and Australia, found that 75 per cent of surviving pets showed noticeable behavioural changes, with cats showing increased affection, clinginess and anxiety-related vocalisations.
It should be noted that both studies relied on owner perceptions to assess changes in pet behaviour, which presents a potential problem. While pet owners are often the most attuned to subtle changes in their animals, their observations may also be influenced by their own grief and emotional state.
There is an alternative explanation for changes in behaviour the owners in studies observed after a companion’s death.
The presence of a deceased animal can signal danger in the environment, causing pets to change their behaviour as a safety measure, rather than being a grief response.
Although this hasn’t been studied in domestic cats, 2012 research on western scrub-jays revealed that seeing a dead member of their species can prompt alarm calls and behaviour aimed at avoiding danger, much like how they would react to a predator.
Similarly, a 2006 study on bumblebees found that they were less likely to visit flowers that contained a freshly killed bee or its scent, probably reducing their own risk of being attacked.
This suggests that what we interpret as grief might, in some cases, be a survival instinct. Some behaviour the owners in the studies noticed after the death of a companion, such as their cat hiding or seeking higher vantage points, could support this idea.
A question you might be asking is whether cats mourn the deaths of their owners. Though we would like to think that our cat would mourn our death, at the minute, we simply don’t know. There seems to be little to no research on how cats react to the death of their owner.
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One unsettling behaviour that has been well documented upon death of an animals’ owner is the consumption of their remains. While cats often get a bad reputation for this, dog lovers should note that both cats and dogs have been known to scavenge human remains. In fact, pet dogs are more frequently documented doing so.
Some scientists suggest this behaviour might stem from hunger, but it has also happened when food was plentiful.
Another theory, better aligned with the idea of grief, is that scavenging might start as an attempt to revive an unresponsive owner. When nudging or licking doesn’t work, the animal may escalate to nipping or biting in an effort to rouse them.
So the jury is still out on whether cats grieve in response to loss, or if are they responding to changes in their environment that we have yet to fully understand.
This article written by Grace Carroll from Queen’s University Belfast is republished from The Conversation under a Creative Commons licence. Read the original article.
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