Cleaning the litter box of solid waste is part of the daily routine, and the litter should be changed regularly. However, this is just the foundation, not a guarantee of a cat’s happiness. A dirty litter box is a significant source of stress for a cat and the most common reason it starts to relieve itself in inappropriate places.
Cats are naturally extremely clean animals, and an unclean or strongly smelling box is repulsive to them. A cat may begin to avoid its litter box and hold in its urine, which exposes it to painful urinary tract infections. For the owner, the problem often manifests as the sofa or carpet suddenly becoming an alternative toilet. Therefore, this is not just about unpleasant odours, but directly related to the cat’s health and well-being.
How often should a cat’s litter box really be changed?
There is no single rule for how often to change the litter. Instead of relying on a calendar, it is better to learn to read the situation and adjust routines according to the cat and the circumstances.
Factors affecting the changing frequency:
- Number of cats: A general rule is one box per cat, plus one extra. In a household with two cats, this means three boxes. The more users there are, the more frequently the boxes need to be cleaned.
- Type of litter: Different litters behave differently, which also dictates the cleaning needs.
- Clumping litter: The most common and convenient option. The litter binds urine and faeces into solid clumps that are easy to scoop out daily. When clumps are removed carefully, the entire amount of litter does not need to be changed constantly. A complete change and wash every 2–4 weeks is sufficient, as long as fresh litter is added to replace the removed clumps.
- Non-clumping litter (e.g. wood or silica-based): These materials absorb urine. Solid waste is removed daily, but because the urine is absorbed into the litter, the entire contents need to be changed regularly – usually about once a week – before the material becomes saturated and starts to smell.
- Box design and size: A covered box effectively traps odours, but at the same time, it can trap ammonia vapours inside. If the cleaning of a covered box is forgotten, it can become an unbearable place for a cat’s sensitive nose. The box must also be large enough for the cat to turn around and cover its waste easily.
5 expert tips for preventing odours and problems
Sometimes the box seems to smell despite regular cleaning, or the cat begins to avoid it. Try these methods then.
1. Choose litter on the cat’s terms
Scented litters are designed to please humans, but many cats dislike strong chemical scents. A safe choice is high-quality, unscented, and effectively clumping clay-based litter. It naturally binds odours without repelling its user.
2. Use enough litter
A layer of litter that is too thin does not absorb urine properly, causing it to seep to the bottom of the box, stick to the plastic, and start to smell. Keep about a 7–10 centimetre layer of litter in the box. This ensures proper clump formation and allows the cat to fulfil its natural instinct to cover its waste.
3. Place the box correctly
Never place the litter box next to the food or water bowls. A cat does not naturally relieve itself near its eating area. The best location is a quiet and draught-free spot, but with an open view of the surroundings. This way, the cat feels safe and is not afraid of being surprised.
4. Clean the box regularly
When you completely change the litter, clean the box thoroughly with hot water and a mild, unscented detergent, such as pine soap. Avoid strong chemicals like bleach or vinegar. Their smell can linger in the plastic and cause the cat to avoid the box. Dry the box thoroughly before adding new litter.
5. Try baking soda
For stubborn odours, you can try baking soda. Sprinkle a thin layer of soda on the bottom of the empty box before adding the litter. Baking soda is a natural and safe deodoriser that effectively neutralises acidic smells.
When problems cannot be solved with home remedies
If a cat suddenly starts to avoid even a clean box, the cause is almost always either pain or stress. First, schedule an appointment with a veterinarian to rule out urinary issues and other illnesses. If the cat is physically healthy, the root cause of the problem can be found in its environment or the stress it is experiencing.
Life changes, such as a holiday or a move, can be tough for a cat. Regular routines are key in such times. We take great care of your cat’s basic needs, such as the impeccable cleanliness of the litter box. Our trained animal caregivers are also skilled at recognising signs of stress and pain, allowing us to address potential problems in a timely manner.
When you need a reliable and stress-free care place for your cat during a holiday or other engagement, we are here to help. Easily book a care session through our booking system or contact us to plan the best possible care experience for your cat.
Frequently asked questions
How many litter boxes do I need?
A good rule of thumb is one box per cat and one extra. Therefore, for a household with two cats, it is advisable to have three boxes. This reduces competition between the cats and ensures that a clean toilet is always available.
Why does my cat urinate outside the box, even though it is clean?
There can be many reasons. First, always rule out illnesses, such as urinary tract infections, with a veterinarian. If the cat is healthy, the reason may relate to stress, the box’s incorrect location, unsuitable litter, or box design. Try moving the box to a quieter location or testing a different type of litter.
Can scented cat litter be used?
We do not recommend scented litters. Cats have a very sensitive sense of smell, and strong artificial scents are unpleasant for many. At worst, a scent can cause a cat to avoid its box altogether. Unscented litter is almost always the safest choice.
How often should clumping litter be completely changed?
When clumps are removed daily, the entire contents of the litter box do not need to be replaced constantly. A complete change and cleaning of the box is typically needed every 2–4 weeks, depending on the litter and the number of cats. The most important thing is to add fresh litter to replace the removed clumps, so that the litter layer remains sufficiently deep.