Have you ever wondered why your cat sometimes brings shrews home?
It can be unsettling when your furry friend brings unexpected "gifts," especially when they involve shrews.
Shrews are not poisonous to cats, but they can transmit disease and often have an unpleasant odor that deters cats from eating them.
In this article, you'll learn all about cats' hunting instincts, the risks of eating shrews, and how to prevent your cat from bringing such prey home.
Understanding the Hunting Instinct in Cats

Cats are hunters by nature, and this instinct is deeply embedded in their DNA. Whether they live in the wild or as pets, the urge to hunt remains. Chasing and eating mice is a natural part of cats' behavior. This hunting instinct develops in the first months of life, when the mother cat introduces her kittens to the art of hunting.
A cat's hunting instinct is not only a survival mechanism, but also provides a physical and mental challenge that contributes to the cat's health and well-being. Successfully catching a mouse is not only a meal, but also a validation of their abilities, which builds the cat's confidence and motivates them to continue hunting.
Eating behavior of cats on mice
Cats, especially outdoor cats, often show a keen interest in mice, which they hunt not only out of hunger but also for exercise and entertainment. Mice provide important nutrients such as taurine, which are essential for the cat's health. However, it is interesting to note that cats often do not eat the whole mouse. The acidic stomach of the mouse is usually left behind because cats do not like the taste.
Despite their role as pure carnivores, cats avoid certain prey, such as shrews, mainly because of their unpleasant smell and taste. This shows that cats' eating behavior can be selective and they instinctively know which parts of the prey are digestible for them and which are not. This selective eating behavior helps cats to instinctively optimize their diet and avoid health problems.
Are shrews poisonous to cats?

If your cat brings home a shrew, you usually don't need to worry that it's poisonous. Most shrews, like the garden shrew, don't have poison glands and are therefore not poisonous to cats. Only special species like water shrews and marsh shrews have poison glands, but even these are not life-threatening to cats. While the bite of such a shrew can be painful, it doesn't usually cause serious health problems in cats.
However, there are a few things to keep in mind if your cat plays with or eats a shrew:
- Painful bites : Although not poisonous, the bite of a water shrew or swamp shrew can be painful for your cat.
- Potential disease carriers : As with many wild animals, shrews pose a risk of transmitting pathogens.
- Unpleasant smell : Many cats avoid shrews because of their strong smell, which is actually a natural defense mechanism.
Overall, shrews are not toxic to cats, but it is always good to be cautious and monitor your cat's interactions with such animals.
Disease Risks from Shrews

Although shrews are not poisonous to cats, they can carry the Borna Disease Virus. This virus is mainly transmitted by field shrews and may not show any symptoms in cats, but may still be dangerous. It is important to understand that the virus is excreted through the mice's urine, feces and saliva, so there is a risk of infection.
Transmission of Borna Disease Virus from shrews to cats and then possibly to humans is rare, but still a serious risk. Here are some points to consider:
- Avoid your cat's contact with shrews , especially in areas where the virus is known to occur.
- Watch your cat for unusual behavior or symptoms that may indicate an infection.
- Consult a veterinarian if you suspect your cat has had contact with infected shrews.
Health risks when eating shrews
If your cat eats shrews, there are some health risks to be aware of. Shrews can carry diseases such as Borna Disease Virus, which rarely transmits to humans but is still a risk. Shrews can also harbor parasites that could harm your cat.
It is important to keep an eye on your cat's health, especially if he or she is an outdoor cat and has access to shrews. Here are some points to look out for: - observe your cat's behavior after eating shrews, - look for symptoms such as lethargy or loss of appetite that could indicate illness, - consult a veterinarian regularly to make sure your cat stays healthy.
Prevention: Preventing Cats from Eating Mice

To prevent your cat from eating mice, it is important to provide them with high-quality food. This will not only satisfy their hunger, but also satisfy their natural hunting instinct. A food rich in animal proteins can help your cat show less interest in chasing and eating mice.
In addition to diet, regular play and interaction with your cat is crucial. Playing games that appeal to the hunting instinct, such as playing with feather fishing rods or interactive toys, can satisfy your cat's need to hunt in a safe and controlled environment. This helps minimize their tendency to search for prey outside.
How Flappie Stops Your Cat from Bringing Mice
Flappie has developed an innovative cat flap that prevents your cat from bringing mice and other prey into the house. The flap is equipped with a camera and artificial intelligence that detects whether your cat has something in its mouth. If your cat tries to enter with a mouse, the flap stays closed.
The advantages of the Flappie cat flap are impressive and can significantly improve your life with your cat:
- Selective access control prevents entry with prey.
- Prey detection using state-of-the-art AI technology.
- Flappie app for remote control of the cat flap with push notifications and videos.
Don't think too long and consider the benefits of Flappie for your home. Visit https://flappie.ch and learn more about this innovative cat flap.
Frequently Asked Questions
Is a shrew poisonous to cats?
No, shrews are not usually poisonous to cats. Most shrews, such as the garden shrew, do not have poison glands. However, there are special species such as water shrews and marsh shrews that do have poison glands, but even these are not life-threatening to cats. The bite can be painful, but does not usually result in serious health problems.
What happens if my cat eats a mouse?
When your cat eats a mouse, it can absorb important nutrients such as taurine, which are essential for its health. However, it is important to note that mice can transmit pathogens, so it is important to observe your cat's behavior after eating and look for symptoms such as lethargy or loss of appetite. If you suspect illness, you should consult a veterinarian.
Why don't cats eat shrews?
Cats often avoid shrews, mainly because of their unpleasant smell and taste. This strong smell is a natural defense mechanism of shrews that prevents cats from eating them. Cats are selective in their eating behavior and instinctively know which parts of the prey are digestible for them and which are not.
Are shrews poisonous to cats?
No, shrews are not usually poisonous to cats. Most shrews, such as the garden shrew, do not have poison glands. However, there are special species such as water shrews and marsh shrews that do have poison glands, but even these are not life-threatening to cats. The bite can be painful, but does not usually result in serious health problems.
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