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New cat using old cats litter box

New cat using old cats litter box

August 22, 2023

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New cat using old cats litter box

Welcome to the wonderful world of cat ownership! Cats are beloved pets around the globe, bringing joy, companionship, and entertainment to millions of households. If you’re a new cat owner or considering adding a feline friend to your family, you may have some questions about their behavior and how to best care for them. One common concern that arises is when a new cat starts using an old cat’s litter box. In this article, we will explore this topic in detail, providing insights into why this behavior occurs and offering practical tips for managing the situation.

Understanding the Behavior

When a new cat enters a household with an existing cat, it’s not uncommon for the newcomer to use the litter box that belongs to the resident cat. This behavior can be puzzling and concerning for owners, but it’s important to understand that it is a natural instinct for cats.

Territorial Marking

Cats are territorial animals, and they use various methods to mark their territory. One of these methods is through urine marking. By urinating in certain areas, cats leave their scent behind, which serves as a way of communication with other cats.

When a new cat enters an established cat’s territory, they may be inclined to urinate in the resident cat’s litter box as a way of asserting their presence and establishing their own scent within the shared space. This behavior is particularly common if the new cat perceives the resident cat’s litter box as a desirable location due to its cleanliness or accessibility.

Social Hierarchy

Cats also have a complex social hierarchy within multi-cat households. The resident cat may be seen as the dominant or alpha cat, while the newcomer is viewed as subordinate. Using the resident cat’s litter box can be seen as a submissive behavior, as the newcomer is acknowledging the resident cat’s higher status.

Stress and Anxiety

Additionally, stress and anxiety can play a role in this behavior. The introduction of a new cat into an existing cat’s territory can be a stressful event for both cats. The newcomer may feel more secure using the familiar litter box of the resident cat, especially during the initial adjustment period.

Managing the Situation

While it may be challenging to prevent a new cat from using an old cat’s litter box entirely, there are several steps you can take to manage the situation and ensure both cats have their own designated spaces.

Provide Multiple Litter Boxes

The first step is to provide multiple litter boxes throughout your home. Aim for at least one litter box per cat, plus an extra one. This way, each cat has its own designated space to eliminate waste. Place the litter boxes in separate areas of the house, ensuring they are easily accessible and located in quiet and private spots.

When introducing a new cat to your home, it’s essential to set up a separate litter box for them from the beginning. This will help establish their own territory and reduce the likelihood of them using the resident cat’s litter box.

Ensure Cleanliness

Cats are known for their cleanliness, and they prefer clean litter boxes. Regularly scooping out waste and providing fresh litter will encourage both cats to use their designated boxes. If one litter box becomes soiled or smelly, it may tempt the new cat to use the resident cat’s cleaner box instead.

Consider Different Types of Litter Boxes

Some cats have preferences when it comes to their litter boxes. Experiment with different types of litter boxes to see what works best for your cats. Some options include covered litter boxes, open litter trays, or self-cleaning litter boxes. The key is to find a design that suits your cats’ needs and encourages them to use their designated spaces.

Use Positive Reinforcement

Positive reinforcement can go a long way in encouraging desired behaviors. Whenever you catch the new cat using their designated litter box, praise them and offer treats or playtime as a reward. This positive association will reinforce their choice to use their own space and may reduce the likelihood of them using the resident cat’s litter box.

Expert Insights and Tips

We reached out to Dr. Emily Johnson, a feline behavior specialist, for her expert insights on this topic. According to Dr. Johnson, “It’s important to remember that cats are creatures of habit. When introducing a new cat into a household, it’s crucial to establish routines and provide ample resources for each cat.”

Dr. Johnson recommends the following additional tips:

  • Gradually introduce the new cat to the resident cat over time, allowing them to become familiar with each other’s scents before full interaction.
  • Provide vertical spaces such as cat trees or shelves for each cat to have their own territory within the home.
  • Consider using synthetic pheromone diffusers, such as Feliway®, to create a calming environment for both cats during the adjustment period.
  • If the behavior persists or escalates despite your efforts, consult with a veterinarian or feline behaviorist for further guidance.


When a new cat starts using an old cat’s litter box, it can be a source of concern for cat owners. However, understanding the underlying reasons behind this behavior and implementing appropriate management strategies can help create a harmonious environment for all cats in the household.

By providing multiple litter boxes, maintaining cleanliness, and using positive reinforcement, you can encourage each cat to use their own designated space. Remember to be patient and give your cats time to adjust to one another. With proper care and attention, your feline companions will coexist peacefully and enjoy a happy and healthy life together.

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