Cat Constipation

What Is Cat Constipation?

Constipation is defined as infrequent or difficult defecation. This may mean hard stool; large, uncomfortable pellets; or no production of poop at all.

Cat constipation is a short-term problem. If your cat continues to be constipated, it can become obstipation (painful defecation) or even megacolon, which is the advanced stage of chronic cat constipation that is often nonresponsive to medical management.

Always take your cat to the vet if they are straining in the litter box. The underlying cause could possibly be serious or deadly if untreated.

Symptoms of Cat Constipation

Symptoms that your cat is constipated include:

  • Little to no fecal production while attempting to poop
  • Frequent visits to the litter box
  • Vomiting
  • Decreased appetite
  • Abdominal pain
  • Decreased energy
  • Decreased interest in interacting with family

Causes of Cat Constipation

Cats can become constipated for many reasons, from stressful situations to health issues. You should always see the vet within 24 hours to rule out health-related causes or underlying diseases.

Litter Box Issues

Sometimes cat constipation starts with a litter box issue: maybe the box isn’t cleaned frequently enough or isn’t easy to access. Or the litter box could be associated with pain while attempting to poop, or with something that’s scary to a cat, like the washing machine buzzer going off.

In these cases, your cat not wanting to go can quickly become not being able to go. To help your constipated cat, examine your litter box and its surroundings, and consider:

  • Moving it to a quiet location with no noises or activity that would be scary to your cat
  • Moving it away from your cat’s food, water, and bed
  • Cleaning it more often to reduce smells
  • Switching to a low-sided box that is easier to access

Not Drinking Enough

Cat constipation could also be caused by not drinking enough water. Your cat’s reluctance to drink might be related to an underlying health concern such as mobility issues, mouth pain, or digestive discomfort. Take them to the vet to rule out any of these issues.

Your cat might also be reacting to an issue with their water dish, such as stagnant or dirty water, or even the type of bowl. Always rule out medical issues first, especially when it comes to dehydration. Then you can also think about:

  • Using a cat water fountain with flowing water that mimics a stream or river
  • Trying water bowls made out of other materials, like glass, ceramic, plastic, or metal
  • Cleaning the water bowl more often

Underlying Disease

Many diseases, both acute (short-term) and chronic, can lead to constipation in cats. These include kidney disease, diabetes, and hyperthyroidism. All cases of straining in the litter box should be evaluated by a veterinarian, because each of these illnesses can become very serious or even deadly if left untreated.


A toy or other nonfood item can obstruct the intestines, preventing the passage of poop. This is considered an emergency. If your cat is constipated and shows any symptoms of obstruction, take them to the vet immediately:

  • Vomiting
  • Lethargy
  • Refusing to eat
  • Swollen belly
  • Refusing to lie down
  • Fever or low body temperature

The inability to urinate is also an emergency for your cat; take them in to see a vet as quickly as possible to get a proper diagnosis and treatment.

Not Enough Exercise

Inactivity can also lead to constipation. You should aim for at least 10-15 minutes of activity interactive play (with you) per day, or more if you have a younger cat or kitten. Here are some tips for making sure your cat gets enough exercise also move enough throughout the day:

  • Cat trees provide opportunities for climbing and exploration
  • Scratching posts allow cats to express the instinct to scratch
  • Toys that mimic prey animals can attract a cat’s attention
  • Smart toys that move on their own motivate hunting and chasing
  • Catnip makes all of these activities more fun for your cat

How Vets Diagnose Cat Constipation

First, your veterinarian will get a history of the problem. You’ll describe the symptoms, when they started, and other factors that may be related to your cat’s constipation.

Providing a full history is very important because straining in the litter box can also be a symptom of lower urinary issues and diarrhea.

After getting your cat’s history, your veterinarian will perform a physical exam. In constipated cats, a vet can often feel the hard stool, but not always.

In order to select the best initial treatment for your cat, your veterinarian will then advise getting X-rays to assess the severity of constipation. Blood tests are frequently necessary to evaluate underlying illnesses that may make your cat more susceptible to constipation.

Treatment for Cat Constipation

Treatment for constipated cats depends on the cause and severity. Constipation that is left untreated can lead to megacolon, a form of constipation that is not responsive to medical treatment and can be fatal.

The first step in treatment is to remove the obstructing feces, which sometimes requires administration of fluids or an enema at the clinic. Never give an enema to your cat at home, as human enemas are not safe for cats.

If the constipation is moderate or severe, your cat will need to be sedated for the enema or deobstipation (manual removal of feces).

The next step is to determine the underlying cause of your cat’s constipation and address it. You may need to make changes in your cat’s environment, like moving the litter boxes, cleaning the water bowl or litter boxes more often, or trying a cat water fountain or a different type of water bowl.

The vet may also recommend switching your cat to low- or high-fiber food and adding medication specifically for constipation.

But more often, treating any underlying disease, such as kidney disease or arthritis, is the most important treatment to prevent a recurrence.

Recovery and Management of Cat Constipation

Once the hard stool is removed, recovery is usually rapid. Unfortunately, if you don’t deal with the original cause, whether it’s treating a health issue or making lifestyle changes, then your cat is very likely to become constipated again.

Follow the instructions provided by your veterinarian. Often the food changes or medications will need to be continued for life. Just because your cat is feeling better doesn’t mean you can stop treatment.

Pro Tip

Hang a calendar on the wall near the litter box to keep track of your cat’s poop schedule. This will help you be proactive at the first sign of a problem.

Cat Constipation FAQs

How can I help my cat with constipation?

See your vet within 24 hours to determine if there are any underlying health issues so you can treat them right and prevent ongoing constipation.

The best course of action is to make an effort to avoid constipation in the first place. Litter bins ought to always be spotless, convenient to use, and placed in a secure area. Make sure your cat gets adequate water and exercise each day.

Will fish oil help cat constipation?

Fish oil won’t help cats who are constipated, sorry. Overdosing on fish oil won’t treat the underlying cause of constipation but can result in uncomfortable cramping and diarrhea.

What do you feed a cat with chronic constipation?

Managing your diet relies on what’s causing your chronic constipation. You should talk to your veterinarian about the particular requirements of your cat at this time.

What is a natural laxative for cats?

Consult your vet before giving your cat a laxative.

You might be enticed to offer your cat over-the-counter items like petrolatum and mineral oil. While they can both ease constipation temporarily, not all cats may be able to use them safely.

How long can my cat go without pooping?

Generally speaking, a healthy cat should urinate at least once daily. A cat shouldn’t go more than 48 hours without pooping unless they just had surgery or are recovering from diarrhea.

Can kittens get constipated, too?

In well-cared-for kittens, meaning those who live in a home with access to clean water and a diet of commercially prepared cat food, constipation is uncommon. Regardless of the cat’s age, a veterinarian should assess any causes of atypical litter box habits.

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