Will My Cat Run Away If I Get A New Kitten?

When pondering the addition of a new kitten to a household, many cat owners often ask themselves, “Will my older cat run away if I introduce a new kitten?”. It’s an understandable concern, given the territorial nature of cats and the adjustments they have to make in the presence of newcomers. This article delves into this question, aiming to give pet owners some clarity and guidance.

1. Understanding Feline Behavior

Before introducing a new kitten to a household with an existing cat, it’s essential to understand feline behavior. Cats are territorial creatures. In the wild, they establish territories to hunt, find mates, and avoid potential threats. In our homes, this translates to established areas where they eat, sleep, and play. The introduction of a new kitten can be perceived as an invasion of territory, leading to possible tension.

2. Will an Older Cat Run Away?

While it’s rare for an established, well-cared-for house cat to run away due to the introduction of a kitten, it can feel threatened and may exhibit stress behaviors. This can include hiding more often, hissing, avoiding interaction, or even spraying. While running away is on the more extreme end of reactions, it’s more likely that your older cat might temporarily seclude itself or display signs of unease.

3. Proper Introduction Techniques

One of the best ways to mitigate the stress and potential conflict between your resident cat and a new kitten is to introduce them gradually and with care.

  • Isolation Period: Initially, keep the new kitten in a separate room with its own litter box, food, and water dishes. This gives both cats time to get used to the scent of the other without direct confrontation.
  • Scent Swapping: Exchange bedding between the two cats to help them get familiar with each other’s scents. This can be an effective way to reduce hostility when they eventually meet.
  • Controlled Face-to-face Meetings: After a few days of isolation and scent swapping, let the cats see each other through a cracked door or baby gate. Gradually increase their exposure over a period of days or weeks, depending on their reactions.
  • Supervised Playtime: Once they seem reasonably comfortable with each other’s presence, allow them to interact under supervision. Look for signs of stress or aggression, and separate them if necessary.

4. Ensure Both Cats Have Their Own Space

One significant way to reduce potential tension is by ensuring both the resident cat and the new kitten have their own spaces. This includes separate litter boxes, food bowls, and resting places. As they become more accustomed to each other, you can introduce shared spaces and resources.

5. Give Equal Attention

Jealousy can be a factor when introducing a new pet. Ensure that you give your older cat plenty of love, attention, and reassurance to show them they are still valued and loved.

6. Factors to Consider

Certain factors can increase or decrease the likelihood of a harmonious integration. For instance:

  • Age and Temperament: An older cat that’s been the sole pet for many years might have a harder time adjusting than one used to the company of other cats.
  • Health: Ensure both cats are healthy. A sick cat can become more territorial or aggressive.
  • Gender: Sometimes, mixing genders (i.e., introducing a female kitten to a male cat) can be smoother than introducing two cats of the same gender. However, individual personalities play a bigger role.


While the introduction of a new kitten can be a period of adjustment for an older cat, the risk of the latter running away is minimal if proper steps are taken. Remember that patience, understanding, and slow integration are key. Over time, many cats will adjust to their new companions, and the household can live harmoniously.

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