Watching your cat strain in their litter box can be worrying, and for good reason. Straining behaviour is usually one of the indicators that a cat is suffering discomfort or pain when going number one or two. It can occur on its own or along with other symptoms. In most cases, straining coincides with frequent litter box visits, prolonged squats, vocalizations, and the production of little to no urine or stool. Cats may also appear restless, abruptly leave their litter box, or lick their genital area after elimination attempts to soothe any discomfort.
Cats are masters of hiding signs of illness, so if it gets to the point where you, as an owner, are able to see them strain, it’s likely to be of significant concern. The important thing to note is that the straining related to urination can look very similar to the straining related to defecation, such that owners must pay close attention when trying to identify the underlying issue.
Straining behaviour is never normal in cats. Often, it can be attributed to minor discomforts, which can be easily managed, but in rarer cases, it has the potential to become life-threatening within hours. Lack of knowledge of the symptoms of straining or failure to get immediate treatment can lead to serious health risks. Therefore, early detection is essential for your cat to have the best outcomes. This article will help you gain a better understanding of the causes and risks of straining behaviour so that you can take action and help your pet be as happy and comfortable as possible.
Common Medical Causes of Straining
Constipation
The first, and maybe most obvious, cause of straining is constipation. Constipation occurs when stool is retained in the colon, causing water to be drawn out, and leading to the formation of hard and dry faeces that are difficult to pass. Experts note that feline constipation can be caused by dehydration, pelvic injuries, obesity, low-fibre diets, or chronic illnesses.
Cats with constipation might strain for long periods, produce small or hard poops, or defecate outside the litter box due to discomfort. Some cats may display a decreased appetite, be lethargic, or vomit as stool accumulation gets worse. It’s easy for owners to mistakenly assume the cause is a urinary issue, especially when little stool is produced.
Feline Lower Urinary Tract Disease (FLUTD)
Another cause of straining is Feline Lower Urinary Tract Disease (FLUTD), a broad term that encompasses several conditions which affect the bladder and urethra of cats. These conditions include feline idiopathic cystitis, urolithiasis, and urethral plugs. The American Veterinary Medical Association lists frequent straining as one of the signs of the disease along with the production of small amounts of urine often.
A more serious outcome of FLUTD is a complete urethral blockage that prevents urine from leaving the body. Specialists emphasize that a blockage is a medical emergency that must be treated within 24 hours because it can lead to rapid bladder distension, kidney failure, dangerous electrolyte imbalances, and even death.
Urinary Tract Infections (UTIs)
True bacterial UTIs, as described by specialists, are more commonly diagnosed in older cats or cats with preexisting diseases. Symptoms include frequent attempts to urinate, blood in the urine, and urinating outside of the litter box. When the bladder lining becomes inflamed, pain receptors are stimulated, which is why cats have an increased urge to urinate (even if the bladder is practically empty), and strain more often.
Megacolon
Megacolon is another condition that may lead to straining in cats. It is described by vets as a condition where there is irreversible dilation and functional obstruction of the colon. This leads to extreme constipation. In certain cases, it may arise on its own, but can also be caused by repeated episodes of stool retention. Cats with megacolon commonly strain with little success, so in some cases, surgery may be necessary.
Intestinal Obstruction
The final common cause of straining is intestinal obstruction.Cats may ingest an indigestible foreign body such as a piece of string or a bone fragment. This situation leads to a partial or complete obstruction of the intestines, and a decrease in GI motility along with straining without defecation.
Non-Medical Causes of Straining
Stress or Anxiety
Chronic stress and anxiety manifest a lot of health problems in animals, so it is hardly a surprise that they also cause urinary tract problems, as well as digestive problems.
Environmental stressors such as changes in the household, conflicts between pets, and even the design of the litter box setup can cause unusual elimination behaviours. Additionally, delayed elimination of waste due to stress or anxiety can make cats both constipate and suffer from urinary inflammation.
Dehydration
Cats have a naturally low thirst drive and therefore tend to produce urine that is of a higher concentration. When their water intake becomes inadequate, their bodies must pull extra water from their faeces, which causes the production of hard stools and higher instances of straining. Specialists recommend offering your cat several sources of water, incorporating more wet food into their diet, and switching to moving sources of water such as fountains, to significantly improve your cat’s voluntary water intake.
Diet-Related Issues
Diet can be a contributing factor to straining, constipation or altered bowel habits in cats who are already prone to gastrointestinal issues. Insufficient fibre intake can reduce the bulk of your pet’s stool and impair the normal motility of their gut. Sudden changes to your cat’s diet may also disrupt gastrointestinal motility as well as the balance of microbiota. Some cats are more sensitive to dietary changes than others, so it’s important to have a baseline of your cat’s sensitivity when considering making a change.
How to Identify the Source of the Problem
If you don’t have an automated litter machine that does it for you, it’s helpful to keep a log that notes the size of the litter box clump (or defecation), the frequency of visits, the location of the elimination (especially if there are repeated occurrences outside the litter box), and the consistency of the elimination. These logs will be helpful when bringing any concerns to your veterinarian and will provide a baseline to compare to if a problem is suspected.
Certain clues are helpful when trying to tell the difference between urinary-related straining and defecation-related straining. If you notice small urine spots, blood-tinged urine, or vocalization during elimination attempts, these signs point towards urinary issues, whereas hard stools or an absence of faeces, point towards constipation.
According to Dr Aisling O’Keeffe, your cat’s posture while straining might be the biggest clue. When cats squat to pee, their bum is nearly touching the litter, their back posture is relatively relaxed and straight, and their back legs are almost flat. Conversely, when they squat to poop, they arch their backs, their back legs are lifted higher off the ground, and their tail might be higher.
When Straining Signals an Emergency
Straining in the litter box becomes a medical emergency when it is caused by a complete blockage (either urinary or gastrointestinal). Unlike constipation, which can progress gradually over time, an obstruction can develop quickly and prevent any waste from leaving the body. Cats experiencing a blockage often make repeated trips to the litter box, strain for a long time without eliminating, and may vocalize or show signs of obvious discomfort/distress.
Obstruction causes pressure to build within either the bladder or gastrointestinal system. At the same time, toxins and electrolytes that are normally excreted, accumulate in the bloodstream, creating a lot of strain within the body.
Male cats are at a higher risk of blockage to the urinary system due to their anatomy. Their urethras are longer and narrower than those of female cats, which put them at a higher risk for obstruction by inflammation, mucus plugs, or mineral crystals. Even mild inflammation has the potential to turn into a blockage over a short period of time.
Additional warning signs that a blockage is occurring are lethargy, vomiting, decreased appetite, abdominal pain, and collapse. Along with straining, these additional signs indicate that your cat’s condition is worsening, and fast.
If you suspect a urinary blockage, immediate veterinary care is essential. Blockages cannot be managed at home, and delaying treatment can result in death within 24 to 48 hours. The earlier the intervention, the better the chance of survival and fast recovery.
This section was written using guidance from the Veterinary Information Network (VIN).
At-Home Ways to Help (When Safe)
Three simple ways you can help treat straining at home (assuming it’s not an emergency) include boosting hydration, modifying diet/fibre intake, and managing litter box spaces appropriately.
Firstly, as mentioned above, increasing water intake with wet food, more water sources, and moving water devices is a great way to support your cat’s overall urinary and digestive health.
Secondly, with the guidance of your veterinarian, you may opt to introduce fibre supplements or switch to a diet with higher fibre content to mitigate mild constipation.
Thirdly, you may opt to make modifications to your cat’s litter box to encourage them to visit it more regularly. If not using an automatic litter box, experts recommend that a a normal box should be deep cleaned once a week. Litter boxes should also be placed in quiet locations that are easy to reach (especially if you have a senior or less mobile cat). These modifications will help reduce any stress-related retention.
Veterinary Diagnosis and Treatment
When you bring your cat to the vet regarding straining, they will start with a physical examination and specifically palpate your cat’s abdomen to feel for any hardness and observe any pained reactions. Next, they will likely use urinalysis, bloodwork, radiographs, or ultrasound to obtain a better picture of your cat’s overall health and what may be causing the straining.
According to the Veterinary Information Network, treatment for gastrointestinal-related issues may be as simple as hydration therapy, laxatives, or dietary modification, but for more serious cases, enemas, endoscopy, or surgery may be required. For urinary conditions, treatment may include pain control, anti-inflammatory medications, antibiotics, catheterization, or, for severe cases, hospitalization.
Prevention Tips
Since straining behaviour usually indicates your pet is experiencing serious discomfort or pain, it’s safe to say that most owners would hope to prevent it from getting to that point in the first place. The best way to prevent straining or any of the related conditions is by supporting both urinary and GI health through consistent daily care.
Feeding your cat a balanced, moisture-rich diet is one of the easiest and most important tools you can rely on, as adequate water intake helps dilute urine and promote normal stool consistency. Proper hydration may reduce the risk of both urinary inflammation and constipation, and is especially important for cats due to their low thirst drive. As previously mentioned, it doesn’t hurt to add a few more water sources throughout the home, or try out some moving water options such as fountains, to increase voluntary water intake.
Stress reduction is another key preventive factor. Providing your cat with a predictable routine, environmental enrichment, and calm resting areas can help reduce elimination-related issues caused by stress.
Finally, maintaining an ideal litter box setup encourages regular and comfortable elimination. Litter boxes should be appropriately sized, kept clean, placed in quiet locations, and provided in sufficient numbers for multi-cat households. Automated litter systems are useful for keeping litter boxes consistently clean, while also allowing you, as an owner, to more easily detect any subtle changes in elimination habits.
Conclusion
Straining in the litter box is always a warning sign and should never be ignored. While causes range from minor (mild constipation) to life-threatening (urinary obstruction), being able to recognize symptoms early is critical.
Getting your cat to the vet quickly can dramatically improve their outcome, particularly for urinary emergencies. Overall, careful observation and proactive care are the best tools owners have to protect their pets’ health.
Sources:
https://www.vin.com/apputil/content/defaultadv1.aspx?pId=8708&meta=generic&catId=18052&id=3843763
https://www.avma.org/resources-tools/pet-owners/petcare/feline-lower-urinary-tract-disease
https://www.purina.com/articles/cat/behavior/litter/how-often-to-clean-litter-box
https://vcahospitals.com/know-your-pet/constipation-in-cats
https://veterinarypartner.vin.com/default.aspx?pid=19239&id=4951735
https://veterinarypartner.vin.com/default.aspx?pid=19239&catId=254073&id=4952574&ind=1141&objTypeID=1007
https://vcahospitals.com/know-your-pet/megacolon-in-cats
https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/hydration
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