Feline Taurine Deficiency

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Taurine is an amino acid that’s necessary for a cat’s body to work correctly. However, unlike in dogs and people, cats can’t make their own taurine out of other amino acids. That makes taurine an essential amino acid for cats. It must be provided at proper levels in their diets.

What Does Taurine Do?

In cats, taurine is necessary for healthy vision, proper GI function, good heart health, and normal pregnancies. It also plays a crucial role in a functioning immune system.

So, as you can see, taurine deficiency can have disastrous effects on a cat’s health.

Where Does Taurine Come From?

Taurine is present in animal-based proteins. Cats must have meat to survive. In the wild, a cat’s regular diet of rodents provides all the taurine they need. But indoor cats fed by humans can become deficient in taurine if they’re fed vegan or vegetarian diets or homemade diets without enough animal protein.

What Are the Signs of Taurine Deficiency in Cats?

When cats don’t get enough taurine, they might exhibit the following signs, though it takes a while on an improper diet before they show up:

  • Impaired vision
  • Dilated cardiomyopathy, or dangerously weakened heart muscle that can lead to signs of heart failure
  • In a mother cat, small or dead kittens or some with physical abnormalities
  • GI problems like vomiting and diarrhea

What Causes Taurine Deficiency in Cats?

As mentioned above, feeding a cat a vegan or vegetarian diet or an improperly balanced homemade diet can lead to taurine deficiency. Feeding dog food (or having a cat that eats a canine housemate’s food and neglects her own) can cause a taurine deficiency.

Certain medical conditions can lead to decreased absorption of taurine, and that means some cats can develop taurine deficiency even when fed a proper diet, but that is rare.

Treatment of Feline Taurine Deficiency

If a taurine deficiency is diagnosed, a veterinarian may prescribe supplementation and diet change. However, damage that has already been done to the heart and retinas can’t be reversed, and since it takes so long for taurine deficiency signs to appear, permanent damage has usually already been done.

Supplementation with taurine may be recommended if a veterinarian suspects a medical condition or poor diet that might eventually result in a taurine deficiency. Other than occasional GI upset, no side effects of taurine supplementation have been reported. If you are concerned about your cat’s diet, talk with your veterinarian about a taurine supplement.


Laurelwood Animal Hospital, located near Jesuit High School on Beaverton-Hillsdale Highway offers a full range of companion animal services, including surgery, nutrition and behavior counseling, parasite control and preventative medicine. The hospital also offers advanced imaging through an all-digital spiral CT scanner, a comprehensive dental program and laser treatment.

If you’re looking for quality, compassionate veterinary care in Beaverton, Oregon, come visit us at Laurelwood Animal Hospital.

Laurelwood Animal Hospital

9315 SW Beaverton-Hillsdale Highway
Beaverton, Oregon 97005

Phone: (971) 244-4230
Fax: (503) 292-6808

E-mail: info@laurelwoodvets.com