The Best Diet for Cats with Urinary Crystals

Struggling to find the best diet for your beloved kitty with urinary crystals? You’re not alone. This article offers tips on what to feed cats with crystals to improve their health and reduce any discomfort. Let’s get started!

Quick facts: Best Diet For Cat With Urinary Crystals

✅ Cats with urinary crystals benefit from a diet that is high in moisture, with at least 75% of the diet coming from wet food. (The Spruce Pets)
✅ A diet that is low in magnesium and is designed to reduce the pH of the urine can help prevent the formation of struvite crystals in cats. (The Spruce Pets)
✅ High-quality protein sources, such as tuna and other fish, should be included in a cat’s diet to promote healthy urinary tract health. (PetMD)
✅ Dry food can be a source of additional water intake for cats, which is important for urinary health. (PetMD)
✅ Many commercial cat foods are formulated specifically to reduce the risk of urinary tract disease and contain fewer ingredients that can promote crystal formation. (PetMD)

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Cats are susceptible to developing urinary crystals, which can occur when there is an imbalance of minerals and other substances in their urine. This is why it’s very important for cat owners to be aware of the best diet for cats with urinary crystals.

The right food can help prevent the formation of urinary crystals in the first place, and also ensure that your cat is getting all the nutrients it needs for a healthy life.

A balanced diet for cats with urinary crystals should include:

  • Wet and dry foods
  • Certain supplements like cranberry extract.

Wet foods tend to be higher in moisture content, which can help flush out toxins from the body. Dry foods contain more minerals that can help keep your cat’s urine at a healthy pH level and reduce the chances of developing crystals. Additionally, adding supplements such as cranberry extract can also help keep urinary tract infections at bay by helping maintain an acidic environment in the bladder.

Causes of Urinary Crystals

Urinary crystals in cats is a common problem that can result in a host of health issues. It is caused by improper diet, inadequate water intake, a bacterial infection, or a blockage in the urinary tract. It is important to identify the cause of the urinary crystals in order to provide the most effective treatment.

Let’s discuss the causes of urinary crystals in cats:


A particular diet is the most important factor in helping prevent urinary crystals from forming. This type of diet is typically known as a low-ash and low-magnesium diet, and includes high levels of water and reduced amounts of minerals like phosphorous. These diets can help lower both the pH level of the urine and the stone formation rate.

It is also essential to include adequate amounts of essential fatty acids and proteins in your cat’s diet, as too little can cause unhealthy levels of acidity within their body. Additionally, ensure that your cat has frequent access to fresh water, so they are more likely to stay hydrated throughout the day.

If you think that your cat may have an underlying health condition causing them to have urinary crystals, it is recommended to discuss this diet with a veterinarian for further guidance.


The environment your cat lives in can influence the risk of developing urinary crystals. For example, cats in stressful environments or those living in a multi-cat household may be at a higher risk of crystal formation. Also, cats that eat one type of food over long periods of time are more likely to develop crystals, because their diets don’t include enough variety throughout the day. Cats that eat wet food only or those that don’t drink enough water are also at higher risk.

Finally, changes in pH and temperature also play a role in the development of crystals, so cats that live in extreme temperatures or whose diet causes acidic urine (low urine pH) may be more prone to crystal formation.


Genetics are an important factor in the development of urinary crystals in cats. Some cats are predisposed to developing urinary crystals due to the composition of their urine. Genetic factors such as urine pH, urine concentration and mineral content can cause some cats to be more prone to developing urinary crystals than others.

It is important to know your cat’s genetic history in order to provide proper dietary care and nutrition that can prevent the formation of crystals. For example, if your cat is genetically prone to higher pH levels, a low-alkaline diet may be more beneficial for them than an average high-protein diet. Additionally, if a cat is prone to calcium oxalate stones, diets with lower calcium and higher magnesium may help reduce the risk of stone formation.


Urinary crystals can be a very serious condition in cats, and proper diet plays a major role in treating and preventing it. It is important to be aware of the symptoms of urinary crystals in cats. Common signs of urinary crystals include:

  • Frequent urination
  • Straining while urinating
  • Bloody or discolored urine
  • Urinating outside the litter box

If you notice any of these signs in your cat, it is important to contact your veterinarian for a diagnosis and treatment.

Straining to Urinate

Straining to urinate is a common symptom of urinary stones or crystals in cats. This can be caused by a blockage of the urine tract due to an accumulation of crystals within the bladder. Your cat may meow or vocalize more than usual when trying to pass urine, as this can be painful and uncomfortable. They may also attempt to urinate more frequently—often with little success due to the blockage. If the obstruction is severe, they might not be able to pass any urine at all, and will need medical attention immediately.

If your cat begins exhibiting any of these symptoms, it’s important you take them in for testing right away. An early diagnosis and treatment plan can help prevent more serious conditions arising from inadequate urination such as:

  • A blocked bladder
  • Life-threatening urinalysis infections

Blood in Urine

One symptom of urinary crystals in cats is blood in the urine. This can sometimes be difficult to detect without professional testing, but it is a telltale sign of a potential issue. The presence of blood in the urine could indicate that a cat has developed painful urinary stones or crystals, and that he or she is struggling to pass them. In some cases, the crystals can block outflow from the bladder and cause an infection to develop.

If you suspect your cat may have urinary crystals, it’s important to seek immediate veterinary attention. Your vet will likely order an ultrasound or X-ray and collect specimens for lab testing in order to identify any urinary stones present. They may also recommend dietary changes and/or medications depending on the severity of your cat’s condition.

Urinating Outside of the Litter Box

Urinating outside of the litter box is one of the most common signs that your cat is suffering from urinary crystals. When cats are unable to easily pass urine due to the crystal formation, they may instinctively look elsewhere to relieve themselves. Pay attention to where your cat is urinating and if it smells especially strong – this may be a sign of a urinary problem.

Other signs include:

  • Frequent trips to the litter box
  • Straining or vocalizing during urination
  • Blood in urine (known as hematuria)

If you notice any of these symptoms, take your cat to the veterinarian right away for diagnosis and treatment. It is important that cats with urinary crystal disorders receive special diet foods that help reduce the amount of minerals that can lead to crystals in their urine.


When it comes to treating cats with urinary crystals, proper diagnosis is key in order to find the right diet to help manage the condition. Diagnosis involves a combination of physical exams, laboratory tests, and imaging. It is important to recognize the symptoms and establish the underlying cause of the problem in order to provide the most effective treatment.

Let’s go into more details:


Urinalysis is a diagnostic test performed to assess the health of a cat’s urinary system and diagnose any diseases present. This test looks for several factors, including the presence of crystals, bacteria, or blood.

A urine sample is typically collected through cystocentesis, which involves collecting directly from the bladder using a needle and syringe. If a cat has crystals in their urine, they can be classified as calcium oxalate (CaOx), struvite (magnesium ammonium phosphate) or urate (urate). The type of crystals present will often inform the treatment and dietary recommendation given by your veterinarian.

Urinalysis may also be used to monitor treatment progress or for screening for urinary tract infections or chronic kidney disease.


X-rays are a valuable tool for diagnosing urinary crystals in cats. X-rays can reveal the shape, size, and location of any urinary stones present in the cat’s bladder. X-rays can also help distinguish crystals from other types of stones or debris that may be present in the bladder.

In addition, X-rays may help to identify any potential blockages or obstructions in your cat’s urinary tract that could be causing the crystals to form. For example, if there is an obstruction due to a tumor or other abnormality, an x-ray can provide important information about how to best treat the issue.

By getting an accurate diagnosis through imaging studies such as X-rays, you can ensure that your cat receives appropriate treatment to prevent future occurrences of urinary crystals.


Ultrasound is a non-invasive imaging technology that allows veterinarians to evaluate organs and internal structures in cats. It is used to diagnose Urinary Crystals in cats.

During an ultrasound, a veterinarian will place a transducer probe against the skin of the abdomen and will take multiple images of the bladder and other organs. By examining these images, it is possible to determine the type of crystals present, as well as any tumors or signs of infection. Ultrasound is also useful to check for blockages in the urethra, which can cause urinary difficulty in cats with crystals.

Ultrasound gives a detailed look at various organs and tissues inside the body and requires no anesthesia or sedation so it is considered very safe for cats.


Diet is an important part of treatment for cats with urinary crystals. Cats require a special diet which is higher in protein and moisture to help manage their condition. This diet is specially formulated with low levels of minerals like magnesium and phosphorus, as these can contribute to the formation of crystals in the urinary tract.

Let’s look at some of the best diets available for cats with urinary crystals:


Treatment for cats with urinary crystals will depend on the type of crystals present and the overall health of your cat. Diet should be one of the main components. Many cats with urinary crystals benefit from a diet that is low in magnesium and acidifying minerals such as phosphorus, as well as an increase in dietary moisture. This means providing a canned food diet if available, or at least supplementing dry food with wet food to promote increased water intake. If your cat has other health issues, you may need to provide a specialized prescription diet to address these additional issues.

Giving your cat plenty of fresh, clean water can also help reduce risk factors for developing urinary crystals or help reduce severity or recurrence if they already have them. Avoid over-treating with treats or table scraps that are high in minerals or magnesium.


Medication is an important step in treating cats with urinary crystals. In order to help dissolve crystals, the veterinarian may prescribe a medication such as a phosphate binder or an acidifier which will help reduce the acidity of the urine and make it more difficult for crystals to form. Additionally, antibiotics may be prescribed if there is a bacterial infection associated with the urinary crystals.

In addition to medications, your veterinarian may also recommend dietary changes for your cat. Foods that are designed for cats with lower urinary tract disease (LUTD) will be beneficial in helping to reduce crystal formation. These diets typically contain fewer minerals than regular diets and are usually higher in moisture content. For cats with certain types of crystals, specialized foods can be used to address their specific needs.

Finally, it’s important to keep your cat well hydrated by providing clean water at all times and encouraging them to drink frequently throughout the day:


Surgery may be recommended for cats with urinary crystals or stones in order to remove the blockage and restore your pet’s bladder health. The type of surgery needed will depend on the size of the crystals or stones, their location in the bladder, and other factors. In some cases, a catheter is inserted into the bladder to break up larger stones and flush them out. Other times, an actual surgical procedure is required to remove the stones or crystals.

In any case, surgery for cats with urinary crystals or stones involves anesthesia and usually requires several days of recovery time at a veterinary hospital. Afterward, your veterinarian will prescribe a special diet designed to reduce future problems with crystals and stones from forming. This diet may include wet food or special treats formulated specifically for cats with urinary crystal problems.

The Best Diet for Cats with Urinary Crystals

Cats with urinary crystals need a diet that can help reduce the occurrence of crystals in their urine. A diet with a reduced level of magnesium and an increased level of moisture is essential for cats with crystals in their urine. Wet food is an especially good option for cats with crystals as it contains higher levels of moisture and is also easier to digest.

Let’s look at what other diet changes you can make to help your cat with its crystals:

Low-Magnesium Diet

A low-magnesium diet is the best diet for cats with urinary crystals. This type of diet helps to reduce the amount of magnesium in the urine, which has been associated with a decrease in uric acid production and an increase in ammonium levels. These dietary changes can help to improve urinary health and reduce the risk of kidney stones or bladder blockages.

A low-magnesium diet is typically high in protein and low in carbohydrates, while also restricting certain minerals found in commercially available pet foods, such as magnesium and phosphorus. Additionally, these diets are often supplemented with vitamins and minerals to ensure that cats receive the necessary nutrition they need for optimal health.

It’s important to make sure that cats receiving a low-magnesium diet should also have access plenty of fresh water throughout the day as well to help flush out any excess crystals from their system.

High-Moisture Diet

For cats with urinary crystals, veterinarians often recommend a high-moisture diet. This means feeding cats wet canned food in addition to, or instead of, dry kibble. The reason for this recommendation is that cats with urinary crystals are prone to dehydration and need more moisture in their diet to avoid developing crystals. Canned foods are also higher in protein than dry foods, which can help reduce the formation of struvite stones.

The high-moisture diet may also reduce the concentration of minerals and other substances which can contribute to crystal formation. Additionally, a high-moisture diet helps promote proper hydration and urinary tract health, as well as helping to reduce the risk of kidney stones. Finally, wet food can often be combined with supplements such as calcium citrate or magnesium citrate to further reduce the risk of crystal formation in susceptible cats.

Limited Protein Diet

A Limited Protein Diet is one of the best diets for cats with urinary crystals. This diet typically contains lower levels of protein than a normal food, while providing your cat with essential nutrients. This diet helps to minimize the accumulation of crystals in the bladder and reduce their chances of crystal formation or recurrence. Additionally, it will help to optimize your cat’s overall health and well-being.

This type of diet should be fed as a preventative measure rather than as a treatment for already existing crystals in his system. Many veterinarians recommend that this type of diet be fed to cats throughout their lives in order to avoid urinary crystal formation and other urological problems.


The best diet for cats with urinary crystals is one that is balanced and adequately hydrated. Good sources of moisture include canned food and water, as well as canned homemade food or a low-salt vegetable broth. A diet should also include high-fiber foods such as canned pumpkin, cooked sweet potatoes, or green beans.

Emphasizing fresh and real ingredients like lean protein sources and healthy fats can help reduce the risk of developing urinary problems in cats with existing issues. Switching up a cat’s diet from time to time can help keep them interested in their meals while providing them with the necessary nutrition for good health.

While some cats may need medical treatments for recurrent crystals, following the best diet can reduce the risk of developing more stones and help your pet live a happier and healthier life.

FAQs about: Best Diet For Cat With Urinary Crystals

Q: What is the best diet for a cat with urinary crystals?

A: The best diet for a cat with urinary crystals is a low-magnesium, low-phosphorus diet that is rich in high-quality protein.

Q: How do I know if my cat has urinary crystals?

A: The best way to determine if your cat has urinary crystals is to have a veterinarian examine a urine sample. A urinalysis will tell you what type of crystals are present.

Q: Is a wet food diet best for a cat with urinary crystals?

A: The best diet for a cat with urinary crystals is one that is low in magnesium and phosphorus and high in quality protein. Wet food is generally higher in protein than dry food, so it may be beneficial. However, it is important to check the label to make sure it is a low-magnesium and low-phosphorus diet.

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