What's a Good Food for a Cat With Struvite Crystals?

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Struvite crystals are urinary tract stones; struvite specifically is a material that is composed of magnesium, ammonium, and phosphate. Stones can have various shapes and sizes, and when they block the urinary tract, they can quickly lead to kidney failure and become life-threatening. Immediate veterinary care is critical for diagnosis and removal. Signs of stones to watch out for include:

  • Frequent use of the litter box.
  • Urinating outside the litter box around the home.
  • Straining to urinate; painful urination accompanied by crying sounds.
  • Excessive licking of the urethral area.
  • Bloody urine.
  • Inappetance.
  • Depression.

Why Struvite Crystals Form

Cats can be predisposed to stones because of:

  • Low water intake.
  • An inflammation of the lower urinary tract.
  • A high pH in the urine (alkaline environment).

The cause of struvite crystals in cats is most often the result of eating dry cat food. Due to the lack of moisture in the diet, the urine becomes too concentrated and highly alkaline.

Most often, dry commercial cat foods contribute to the development of struvite crystals. Due to the lack of moisture in kibble, cats get dehydrated, the urine becomes too concentrated, and plant-based ingredients in dry food cause the urine to become too alkaline. The combination of alkaline and concentrated urine makes cats prone to forming struvites.

To eliminate struvite crystals, the goal is to create a more acidic and diluted urine.

Cats do not drink water naturally, as they've evolved over​ a millennium to get most of their moisture from prey. Using prescription diets to make the urine more acidic often does not work because most cats find the foods unappetizing.

The best line of defense (and prevention) is a balanced raw meat diet that should help eliminate struvite crystals and prevent them from recurring.  This will encourage a more natural pH in the urine, and the water content of raw meat (usually containing 75 – 80 percent moisture) creates a more dilute urine that's not conducive to the formation of struvites.

Tips to Prevent Recurrence of Struvite Crystals

Here are some additional easy tips to help prevent struvite crystals from recurring:

  1. Feed small meals frequently which will help reduce fluctuation in urine pH.
  2. Provide fresh water places in multiple water dishes in different places. Try a fountain to pique your cat's interest. You can also offer chicken broth to encourage your cat to drink more.
  3. Provide a sufficient number of litter boxes placed in quiet areas.
  4. Decrease stress by reducing major changes in routine.