Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

What Do the PrettyLitter Colors Mean? Explanation with Color Chart

Share

pretty litter

Staying on top of your cat’s health can be difficult, even if you religiously take your pet to the veterinarian for regular checkups and dental care. Urinary tract infections (UTIs) and conditions like kidney tubular acidosis or the presence of crystals often create health problems that can’t be anticipated.

The clinical signs are often missed until the cat begins exhibiting troubling behavior, such as difficulty urinating, often resulting in a veterinary emergency. PrettyLitter provides you with a convenient way to keep an eye on your pet’s health. The innovative silica crystal litter is pH sensitive, turning one of four colors depending on the acidity or alkalinity of your cat’s urine. While not diagnostic, it provides another piece of information that you can use to monitor your cat’s health. Below you’ll find a deeper explanation as well as our PrettyLitter color chart!

divider 1 paws

What Is PrettyLitter?

PrettyLitter is a crystal litter that changes color in response to changes in your cat’s urine pH. It turns yellow or green if everything is within a normal pH range. High pH readings are indicated by the crystals turning blue. According to the PrettyLitter website, abnormal, alkaline urine often indicates a bacterial UTI.1

When exposed to low-pH or acidic urine, the crystals turn dark orange, which often accompanies metabolic acidosis or kidney tubular acidosis, these conditions can be present when cats have bladder stones or kidney issues. Red crystals indicate the presence of blood in the urine, which suggests the presence of crystals or bladder stones, inflammation, bladder cancer 

 or a UTI.

It’s a silica crystal-based product, meaning you won’t be able to remove urine clumps during daily cleanings. Litter color changes and smell are the only ways to be sure all the crystals are saturated.

There are two ways to get your hands on PrettyLitter. Head to the website, answer a few questions to find out how much of the product you’ll need every month, and sign up for the subscription service to have cat litter delivered to your door every 3 or 4 weeks.

Alternatively, you can find the product at Target and Walmart stores, making it easy to give the litter a try without worrying about canceling anything if you’re not satisfied.

Catster_Pretty Litter Colors Infographic_v1-4_Dec 6 2024
Image Credit: You are free to use this image, but please pay attribution back to Catster.com

PrettyLitter Color Chart

Here is an infographic of the PrettyLitter color meanings.

Color Olive Green Blue Orange Red
pH Normal pH High pH Low pH Blood in urine
Possible Conditions No associated conditions Struvites
Bacterial UTI
Calcium oxalate crystals
Kidney disease
Kidney tubular acidosis
Metabolic acidosis
UTI
Bladder cancer
Bladder inflammation
Bladder stones
Kidney disease
UTI

Is PrettyLitter a Scientifically Proven Diagnostic Product?

Absolutely not. The company doesn’t claim its products will catch all infections or inflammatory conditions. Nor does the manufacturer claim that the litter’s pH readings provide any definitive information about the overall state of a cat’s health.

At no point does PrettyLitter claim that green crystals mean that there’s nothing wrong with your cat and that red ones indicate an emergency veterinary visit is overdue. The litter reflects your cat’s health, as noted in the acidity of your pet’s urine, which is only one of several signs or biomarkers to consider.

Some owners have had positive experiences with the product, as it accurately indicated a feline health issue that needed addressing. Others have expressed disappointment with the product due to its failure to warn about conditions like UTIs that were later clinically diagnosed.

It’s essentially up to each owner to decide how to best use PrettyLitter’s pH information. But the answer to the initial question is no, PrettyLitter isn’t a scientifically proven diagnostic tool.

divider 1 paws

Clay, Crystal, or Biodegradable Litter?

There are roughly three types of cat litter currently on the market.

Clay Litter

clumping clay cat litter
Image Credit: Imageman, Shutterstock

Clay litter is usually bentonite clay, which clumps and traps moisture. Clumping products make it easy to scoop out urine and feces from litter boxes, and clay is pretty effective at limiting smells.

Crystal Litter

Cat and crystal cat litter
Image Credit: Axel Bueckert, Shutterstock

Crystal products are a great choice if you’re interested in reducing dust and tracking. Clay products produce a good bit of dust and are easy for cats to track throughout the house. A great deal of vacuuming is often required to keep clay-based-litter-associated dust under control. Crystal-based cat litters usually produce far less dust, making them ideal for people or cats with allergies or conditions such as asthma. PrettyLitter is, according to its manufacturer, 99% dust free!

Crystal litters also tend to last longer and are often easier on the pocketbook than clay litters that require weekly replacement. PrettyLitter usually only needs to be changed once a month.

Biodegradable Litter

Cat litterbox with natural flushable biodegradable tofu litter
Image Credit: lermont51, Shutterstock

Biodegradable products are the third option. These choices break down after use instead of contributing to landfill growth. Although some of these products are marketed as flushable, putting cat waste down the toilet is problematic for public health reasons. The practice can lead to unhygienic sewer backups and the infection of wild animals with Toxoplasma gondii.

However, biodegradable options have many benefits, even if they aren’t technically flushable. Many are made with sustainable materials such as recycled newspapers or dried tofu. Most feature recycled or recyclable packaging, giving these products reasonably good sustainability profiles.

They’re available in clumping and non-clumping options, and you can also find scented and unscented choices. Many unscented products include natural odor neutralizers such as baking soda. You can find several options if environmental sustainability is essential to you.

Disposing of Biodegradable Litter

There are two ways to dispose of used biodegradable kitty litter responsibly: Throw it in the trash or compost it. It’s fine to throw these products away, but using a recycled, biodegradable trash bag can reduce your cat’s overall carbon footprint.

Instead of tossing it in the trash, you can take biodegradable litter to the compost bin. You’ll need to throw away the bits your cat pees or poops on, but the other parts can be composted and used on non-edible plants.

divider 1 paws

Conclusion

PrettyLitter is a crystal, non-clumping product that offers information about your cat’s urinary tract health. It changes colors to reflect the pH of your pet’s urine, which may provide an early indication of some types of illness. PrettyLitter isn’t a medical product, though, nor does it claim to be one. It’s a litter that can provide a bit of feedback on the acidity of your cat’s urine. Ultimately, it’s up to you to determine if PrettyLitter is necessary for your pet’s litter box.


Featured Image Credit: PrettyLitter

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Catster's Digital Magazine is Back!

Vet-approved health & behavior advice

Real cat stories & community features

Chatting About the Rainbow Bridge, Euthanasia, and Laughter During Grief | Chatty Cattys, Episode 24

If you’ve ever felt the loss of a beloved cat, or are dreading the day when your pet crosses the rainbow bridge, you’ll...

The Simple Reasons Cats Refuse to Let Anyone Use the Bathroom Alone

Cats have an extraordinary talent for making themselves present in the most inconvenient places, and the bathroom ranks near the top of the...

A Paw-sitive Milestone: Canada Officially Becomes a Declaw-Free Nation

Canada has officially become a declaw-free nation. On May 25, 2026, a new regulation was filed in Ontario under the Provincial Animal Welfare...

The Surprisingly Simple Ways to Help a Cat With Hairballs

Cats spend an astonishing amount of time grooming. It is part hygiene routine, part comfort ritual, and part instinct that traces back generations....

More related

Can Cats Eat Rice Krispies? Vet Approved Facts & FAQ

Rice Krispies are a beloved breakfast cereal made from puffed rice. Kids love this sweet food for its fun popping sound. Some may...

How to Care for an Abused Cat: 7 Ways to Help (Vet Answer)

It can be difficult to know for sure if a cat was abused. Certain signs, such as fear of strangers (or of a...

Is Catnip Bad for Cats? Vet-Verified Facts to Know

If you have seen your cat go crazy for catnip and act as if they are “high” and you want to know if...

My Cat Ate Rat Poison: Symptoms & What to Do (Vet Answer)

It’s not uncommon for our furry friends to find themselves in trouble after eating something they shouldn’t have. If your cat ate rat...

Keep reading

9 Best Grocery Store Cat Foods in 2026 – Reviews & Top Picks

If you are a cat owner, you know one of the most challenging aspects of raising your cat is feeding them healthy food that will provide them with the nutrients they require without upsetting their delicate digestive system. It’s even...

Siamese cat eating dry food from a bowl

Why Do Cats Like Their Ears Rubbed? 5 Vet Reviewed Reasons

When you pet your cat, you’ve likely noticed that they want more of it. But why is it that cats like it when you rub their ears, how can they tell you they like it, and what are some other...

cat with a ear hematoma

The Simple Reasons Cats Refuse to Let Anyone Use the Bathroom Alone

Cats have an extraordinary talent for making themselves present in the most inconvenient places, and the bathroom ranks near the top of the list. It is one of the most universally shared experiences among cat owners, and yet the reasons...

Cute cat sitting on toilet bowl with rolls of paper

Why Is My Cat Peeing on the Carpet & How to Stop It: 7 Vet-Approved Reasons

If your typically pristine and proper cat is suddenly ignoring their litter box and peeing all over your carpet, it can become a frustrating (and smelly) problem for cat parents. The strong odor and constant carpet cleaning can definitely take...

cat with pee stain on carpet

Stella & Chewy’s Cat Food Reviews 2026 : Recalls, Pros & Cons

Review Summary Stella and Chewy’s Cat Food manufactures freeze-dried raw food, meal toppers, and raw frozen meals. They have a very good range of foods made from good quality ingredients. Their food is easy to get hold of and is...

Stella & Chewy's Cat Food Review

Can Cats Eat Lima Beans? Vet-Reviewed Precautions & Health Guidelines

Beans are a popular staple throughout the world, used in many dishes, and enjoyed for their flavor and high protein content. While the most popular beans tend to be black beans, soybeans, and pinto beans, other beans do exist and...

Can Cats Eat Lima Beans

IMHA in Cats: Signs, Causes & Care (Vet-Reviewed)

IMHA, or immune-mediated hemolytic anemia, describes a condition where the immune system misfires and breaks down the body’s red blood cells, a process called hemolysis. You may see it called autoimmune hemolytic anemia (AIHA) as well. The body inappropriately attacks...

veterinary-blood-test

Why Is My Cat Hissing at Me All of a Sudden? 4 Vet-Reviewed Reasons

A cat usually hisses when they feel uncomfortable or threatened by something in their environment, either another cat, another animal, or even a human. Yes, it can even be their owner! But an occasional snub isn’t the same as your...

Scottish fold cat very angry and aggressive

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.