Veterinarian Explains: Toilet Issues in Senior Cats and How to Create a Comfortable Elimination Environment

As cats age, they may experience more frequent toileting accidents due to both general physical decline and illnesses such as chronic kidney disease. In this article, we will provide a detailed explanation regarding litter boxes for senior cats.

What are the main reasons senior cats have trouble with the litter box?

Elimination issues due to joint pain and muscle weakness

Approximately 70% of cats over the age of 12 suffer from arthritis. Among types of arthritis, osteoarthritis is commonly seen in senior cats. Osteoarthritis frequently occurs in joints such as the elbows, shoulders, knees, ankles, and hips, and it can also occur in the spine (spondylosis deformans). Osteoarthritis causes pain due to joint inflammation and the development of bony growths called osteophytes. When cats are in pain, they become reluctant to move, which leads to muscle weakness.

Cats with arthritis find even minor steps difficult to climb up or down. Most commercially available litter boxes have a raised entrance or require the cat to step over a barrier to enter. Consequently, senior cats may be unable to use such boxes, leading to an increase in accidents outside the litter box.

Furthermore, because they may prefer not to walk much, they might end up eliminating very close to their own living area.

The impact of dementia and stress on toileting behavior

As senior cats experience cognitive decline, they may forget where their litter box is, or simply rearranging the furniture can make it difficult for them to find it, causing them stress. If they cannot use the litter box, they may have accidents right nearby.

Health signs indicated by litter box accidents

Toileting accidents can be signs of various illnesses. Major diseases include chronic kidney disease, diabetes, cystitis, urolithiasis, megacolon, osteoarthritis, and tumors.

These diseases lead to toileting accidents because the cat may have "increased urine volume that they cannot hold," "difficulty urinating," "difficulty defecating," "frequent bowel movements," or "inability to walk to the litter box."

How to choose a litter box suitable for a senior cat

Recommendation for low-entry litter boxes for easy access

Many litter boxes on the market have a step at the entrance or a high threshold. These are designed to keep litter and waste from scattering outside. However, for senior cats, climbing over this step becomes difficult. Therefore, we recommend litter boxes designed with a low entrance. Using one designed based on cat behavioral studies or substituting a dog litter tray can also be effective.

Optimizing the size and placement of the litter box

The ideal litter box for a cat is considered to be one that is 1.5 times the size of the cat's body, large enough that they do not hang over the edge when turning around. Furthermore, you need at least one more litter box than the number of cats you have. For senior cats in particular, it is desirable to have a litter box within their range of movement.

How owners can respond to litter box accidents

Identify the reason they aren't using the litter box

Even if a senior cat has an accident, you must never scold them. There is a reason for such accidents. As these are often signs of illness, you should identify why they cannot reach the box and take them to a veterinary clinic as soon as possible.

One reason cats may stop using the litter box is that it is dirty. Clean it at least once a day. Since senior cats may have increased urination due to conditions like kidney disease, cleaning it frequently is best. Also, pain or difficulty moving may prevent them from reaching the box. Observe their usual walking and jumping habits carefully.

If there are urinary issues or constipation, the cat may develop negative associations with the litter box or continue having accidents. Monitor whether they are able to eliminate properly every day, and check the amount, color, consistency, and whether they cry during elimination.

Health tips from checking waste

As cats age, they become more susceptible to various illnesses. Key points to check in waste include the amount, color, frequency, and the cat’s behavior during elimination.

Most senior cats develop chronic kidney disease, a symptom of which is producing large amounts of dilute urine. Diabetes also causes the production of large amounts of dilute urine. Furthermore, kidney disease and diabetes can trigger cystitis, leading to frequent or bloody urination. Urinary stones are another urinary issue; they may cause the cat to be in pain while urinating, or lead to small amounts of urine or complete inability to urinate.

Diarrhea and constipation represent gastrointestinal abnormalities. As cats age, chronic kidney disease or tumors may cause diarrhea or constipation. These conditions will not improve without treatment.

Do not scold them for accidents

Cats have an instinct to recognize areas with sand as toilets. Therefore, even kittens can usually use a litter box without being taught. Accidents in senior cats are caused by them forgetting the location of the litter box or being unable to reach it in time. Since the cat is not having accidents on purpose, please never scold them. You need to identify the cause of the accidents and have the patience to accept them.

In cases of cognitive decline, you should place litter boxes within the cat's movement range, put a tissue containing the scent of their waste in the box, and guide them to it when it is time to eliminate. This takes considerable time, so please be patient.

Care to prevent elimination issues in senior cats

Diet and hydration management

Because kidney disease is common in older age, you may need to switch to a therapeutic diet. Additionally, many cats with arthritis are obese, so a weight-loss therapeutic diet might be suggested. Senior cats tend to have lower activity levels and are prone to exceeding their calorie needs. You should switch to senior cat food even if they are currently healthy.

Hydration is also important. Cats are naturally animals that do not drink much water, and this decreases further with age. Due to cognitive decline or loss of muscle mass, they may no longer be able to reach their usual water station. Place both food and water near the cat's living space and increase the number of water stations.

Even if food and water intake decrease, leaving them out can lead to bacterial growth. Replace them several times a day even if some remains.

Early detection of abnormalities through regular health checks

Cats aged seven and over are considered seniors. You might feel they are still young, but from age seven onward, diseases such as chronic kidney disease, diabetes, and tumors become more frequent. While people tend to avoid vet visits for cats, by the time symptoms appear and you visit the vet, the condition is often terminal. Therefore, regular health checkups are important. For cats seven years and older, twice-yearly checkups are recommended. Sometimes, even seemingly healthy cats may have early-stage disease. Make sure to have regular checkups from a young age.

Creating an environment that reduces stress

Senior cats may forget the location of the litter box due to cognitive decline. Rearranging the furniture in the room causes stress and can also make the litter box difficult to find. Therefore, you should be considerate to minimize stress during their senior years and avoid rearranging furniture as much as possible.

Some people welcome new kittens or puppies thinking it will provide exercise for the senior cat. Introducing a new animal can be a significant stressor for a senior cat, potentially affecting their health. If you must bring another animal into the home, prepare the environment, such as by separating the rooms, beforehand.

Cases requiring veterinary treatment

Potential urinary tract diseases

If large amounts of dilute urine are produced, there is a possibility that a senior cat has chronic kidney disease. Unfortunately, there is no effective cure in modern veterinary medicine, and only symptomatic treatment based on symptoms is performed. Initial symptoms are minimal, but as it progresses, large amounts of dilute urine are produced. At this stage, kidney function is significantly impaired, and immediate treatment may be necessary.

If urine is difficult to pass, or if there is frequent urination, blood in the urine, or a complete inability to urinate, there may be urinary stones or cystitis. If a cat enters the litter box but cannot pass urine for half a day or more, it can lead to impaired kidney function. This is a life-threatening condition; do not wait and visit a veterinary clinic immediately.

If chronic constipation or diarrhea persists

In senior cats, constipation and diarrhea can occur not only due to declining digestive function and muscle weakness but also due to illness. In severe constipation, they may be unable to pass stool on their own, leading to vomiting and loss of appetite. In such cases, enemas or sedation to manually remove the stool may be necessary.

Prolonged diarrhea can lead to dehydration and malnutrition. It can also cause irritation to the anus, which is painful for the cat. Medication to stop diarrhea or fluid therapy may be required.

Dementia treatment and lifestyle support

Some senior cats experience cognitive decline, showing symptoms similar to dementia in humans. This includes nighttime crying, aimless wandering, and toileting accidents. There is no cure for cat dementia, but it can be managed with anti-aging supplements. If nighttime crying is severe, it can lower the owner's quality of life, so a vet might prescribe sleep aids for the cat. Additionally, to prevent injury from wandering, we may advise keeping them in a limited space.

Summary

Toileting issues in senior cats are caused by pain, illness, or cognitive decline. It is important not to get angry when accidents happen, but rather to identify the cause and provide support so that they can avoid accidents in the future.