What are the signs that a cat is not happy to share its house (with another cat)?

Cats are territorial animals and may not always be happy to share their space with another cat. Here are some signs that a cat may not be happy sharing its house:

1. Aggression: This is one of the most obvious signs. If your cat is hissing, growling, swatting, or showing other aggressive behaviors towards the new cat, they may not be happy about sharing their space.

2. Marking territory: If your cat starts spraying urine or scratching furniture more than usual, they may be trying to mark their territory to signal to the new cat that this is their space.

3. Changes in behavior: If your cat starts hiding more, becomes less social, or changes their eating or litter box habits, they may be stressed about the new cat.

4. Over-grooming: Some cats may start grooming excessively if they are stressed or unhappy. This can lead to bald spots or skin irritation.

5. Avoidance: If your cat is avoiding areas of the house where the new cat spends time, or if they are avoiding the new cat altogether, they may not be happy about sharing their space.

6. Staring or stalking: If your cat is constantly watching the new cat or following them around, this could be a sign of tension.

If you notice these signs, it's important to take steps to help your cat feel more comfortable. This could include providing separate resources (like food bowls, litter boxes, and beds) for each cat, giving each cat their own space, and slowly introducing the cats to each other using scent swapping and controlled introductions. If the tension continues, it may be helpful to consult with a veterinarian or a professional cat behaviorist.

1. Aggression: One of the most obvious signs that a cat is not happy to share its house with another cat is aggression. This can include hissing, growling, swatting, or even outright fighting.

2. Marking Territory: If a cat is unhappy about sharing its space, it may start marking its territory more frequently. This can include spraying urine or leaving feces outside of the litter box.

3. Changes in Behavior: A cat that is unhappy may exhibit changes in behavior. This can include becoming more withdrawn or hiding more often. They may also become less playful or stop eating as much.

4. Over-grooming: Some cats may start to groom themselves excessively if they are stressed or unhappy. This can lead to bald patches or sores on their skin.

5. Avoidance: If a cat is not happy to share its house, it may start avoiding the other cat. This can include staying in different rooms or spending more time outside.

6. Changes in Vocalization: A cat that is unhappy may start to vocalize more often. This can include increased meowing, growling, or hissing.

7. Not Using the Litter Box: If a cat is unhappy about sharing its space, it may stop using the litter box. This can be a sign of stress or a way of marking territory.

8. Changes in Sleeping Patterns: Cats that are stressed or unhappy may start sleeping more or less than usual. They may also start sleeping in different places.

9. Decreased Appetite: A cat that is unhappy may start eating less. This can be a sign of stress or a way of expressing displeasure.

10. Pacing or Restlessness: If a cat is not happy to share its house, it may start pacing or showing signs of restlessness. This can be a sign of stress or anxiety.