munchkin cat in front of self-cleaning litter box
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Why You Should Monitor Your Cat’s Litter Box Habits

Est. read time: 5 min.

It’s tempting to treat your cat’s litter box with an “out of sight, out of mind” mentality. You may be an ideal scooper—scooping the litter box daily, that is—or you may even have a self-cleaning litter box. But how often do you really pay attention to the contents of the litter box? As unpleasant as it sounds, it’s important to monitor your feline’s litter box habits. You may just end up saving your cat’s life!

Reminder: The two rules of the litter box

With traditional litter boxes, you should be following these two rules:

Have n+1 traditional litter boxes per cat 

That is, if you have 1 cat, you need n+1 litter boxes (in other words, 2). If you have 3 cats, you need 3+1 litter boxes (a total of 4). 

Scoop daily

According to Dr. Justine Lee, DVM, DACVECC, DABT, cats don’t want to step into a dirty litter box too often. If the litter box is dirty, they may choose to only urinate once a day instead of 2-3x/day; when this happens, their urine becomes very concentrated, and with it, red blood cells, mucous plugs, or even crystals can become more concentrated. This can potentially result in Feline Idiopathic Cystitis (FIC) or the more life-threatening urinary blockage called Feline Urethral Obstruction (FUO).

orange tabby cat using self-cleaning litter box

An automatic, self-cleaning litter box like Litter-Robot provides a clean bed of litter every time, making it a suitable litter box for up to four cats. However, even with a self-cleaning litter box you should be paying attention to your cat’s litter box habits. 

Clump size matters

Something you might not realize you should be paying attention to in your cat’s litter box? The size of their urine clumps! 

Large clumps

How big should a clump be? Dr. Lee says it depends on multiple factors:

  • Whether your cat is the type to hold their urine all day (most cats aren’t)
  • How many trips to the litter box they like to make (most cats visit 2-3x daily)
  • What type of food you feed them (canned food may make them pee a little bit more)
  • How often you clean out the litter box

If you notice the urine clumps getting bigger and bigger, bring your cat to the vet. Dr. Lee’s rule is if the clumps are bigger than a petite woman’s clenched fist, then they’re too big. Make an appointment to get your cat’s kidneys, thyroid, and blood sugar checked: Large clumps may be a sign of kidney disease, diabetes, or hyperthyroidism.  

The absence of clumps

On the other hand, the absence of many clumps in the litter box is also cause for worry. This is probably a sign that your cat is straining to urinate or urinating in unusual places. Together, these symptoms point toward your cat having FIC, FUO, or a Urinary Tract Infection (UTI). Make a trip to the vet for a proper diagnosis.

A spike in activity

If you scoop daily, you’re more likely to notice a sudden increase or decrease in litter box use. Litter-Robot takes this a step further by literally showing you the data. With the Whisker app, you can view the waste drawer level, get notifications, and see recent usage history for insights into your cat's health. (Note: Screens may vary as the app gets updated.)

Whisker app clean cycle data

For instance, if you notice a dramatic spike in activity, you’ll know it’s time to make a trip to the vet—just as these pet parents did when the Whisker app started notifying them every 10 minutes. Hear their story below:

Note: If you have more than one cat, you will not be able to tell which cat has used Litter-Robot 3 Connect via the app. Litter-Robot 4 features laser and weight sensor technology that detects cats weighing 3+ lbs.; individual cat recognition will be launching in the future, as additional hardware is required to distinguish cats of similar size. 

Blood in the litter box

Don’t ignore blood in the litter box. Dr. Lee explains that it’s difficult for the average cat parent to differentiate between bloody urine, feces, or vomit. She suggests taking a photo on your smartphone to show the vet. If possible, suck some of the bloody contents up with a dosing syringe or wipe it up on a clean white paper towel and fold it into a plastic Ziploc bag to take to the vet, as well. Blood in the litter box is most likely a sign of FIC, FUO, a UTI, or (rarer) bloody diarrhea. 

Worms in the litter box

Unfortunately, finding worms in the litter box isn’t totally unusual. Gastrointestinal parasites—including tapeworms, roundworms, and hookworms—occur in cats that have not been appropriately dewormed, and are very common in young kittens. You may notice signs of worms in your cat’s perianal area, tail, or feces in the litter box. Tapeworms often look like small, white pieces of rice (or sesame seeds), while roundworms look like long, white or light brown noodles and can grow to be several inches long. It’s important to treat your cat as soon as he or she is diagnosed with gastrointestinal parasites to prevent damage to your cat’s body and to prevent accidental spread to humans.

Whether you have a traditional litter box or a self-cleaning litter box like Litter-Robot, you should be monitoring your cat’s litter box habits—including the contents of the litter box. Noticing the early signs of disease or parasites can mean the difference between life and death. Why? As Dr. Lee says, “Because cats have such stoic natures, they don’t show clinical signs of illness until it’s really, really severe.”


munchkin cat in front of a grey self-cleaning Litter-Robot 3 Connect; why you should monitor your cat's litter box habits