Vet Blog

08/16/08

Why Does my Cat Vomit so Much?
Dr. Eric Barchas, DVM

717px-akaneko_001.jpgMy nine-year-old Orange Tabby has vomited periodically most
of her life. Within the last few months, her
vomiting has increased to the point that I had to
rush her to vet ER. They hydrated her, ran
blood tests, xrays, etc.

Her vet says she is most
likely allergic to her food, so we switched her to
limited ingredient dry food. To combat her
nausea, her vet put her on ground up Pepcid AC,
which she will only consume in a little of the
water from a can of tuna. I also give her a bit
of Kitty probiotics and brush her twice a day.

Her vomiting is not diminishing in spite of all
the treatments and the vet said exploratory
surgery is all that’s left, which is not what he
recommends nor do I want. I even tried her on
raw cat food, which she tried once and vomited and
now won’t touch. Are there any natural means you
could recommend?

Jill
Portland, Oregon, USA

It sounds like you and your cat are going through quite an ordeal!

Many things can cause cats to vomit. Food intolerance, metabolic disorders (such as liver or kidney disease), foreign objects in the stomach, neurological problems, heartworm disease, intestinal parasites, tumors, problems with the pancreas and exposure to poisons are among the many offenders, and this list is far from complete.

However, in cats that have a long history of vomiting that worsens precipitously I am often suspicious of a syndrome called inflammatory (or infiltrative) bowel disease. The syndrome is also known as IBD.

Cats with IBD suffer chronic irritation of the intestines. This leads to vomiting, diarrhea, or both.

Diagnosing IBD can be difficult. A biopsy of the intestines (by means of surgery or endoscopy) is the most definitive method, but it is very invasive and I rarely recommend it.

However, you do not mention that your cat has had an ultrasound of her abdomen. Ultrasound is a powerful, non-invasive and painless diagnostic technique. Skilled ultrasonographers can sometimes diagnose IBD. And they almost always offer insight into the cause of chronic vomiting. I would recommend abdominal ultrasound as the next step for your cat.

If your cat is diagnosed with IBD, several treatment options exist. Dietary modification is the mainstay of treatment, but it sounds like you may have exhausted this possibility. Probiotics help many cats; yours, unfortunately, seems refractory to this treatment.

I have seen many cats with chronic vomiting respond favorably to treatment with medicines that modulate the immune system. Prednisone is most commonly used. As I have mentioned before on this blog, prednisone is a double-edged sword. However, you may want to discuss a trial of the medicine with your veterinarian. It may help solve the problem.

See related Vet Blog entries:
05/05/08

What Causes Weight Loss and Loose Stools in Older Dogs?
Dr. Eric Barchas, DVM

My dog (approximately 12 years old) keeps having
bouts of diarrhea. This has gone on (off and on)
for about two years. My vet has given him several
rounds of medicine (one for tummy upset and one
for loose stools). Additionally, he has given him
some powder to try to balance the “flora” in his
digestive tract. Also, he recommended I feed him
Purina EN (dry and canned) to help with his
stomach. Nothing seems to help. He likes to eat
grass, which seems to be the only thing he gets
into when he is out in the yard. We give him
Meaty bone biscuit treats. I generally mix in
rice with his food when his stools are very runny.
And now he is starting to lose weight.

Liz
Margate, South Florida

I am a bit troubled by your final comment–that your dog is starting to lose weight.

A number of syndromes can cause intermittent diarrhea, and some animals have irregular bowel movements throughout their lives. For instance, a syndrome called infiltrative (or inflammatory) bowel disease (also known as IBD) is a common cause of chronic, intermittent diarrhea. This disease is frustrating, but treatable.

However, when an older dog develops diarrhea in combination with weight loss, something more serious may be going on. For instance, disorders of the liver, pancreas, kidneys, and intestines can cause this combination of symptoms.

It sounds like your vet has treated your pet for some causes of chronic intermittent diarrhea with special diets and dietary flora supplements. But you don’t mention whether he has run any tests to determine what is causing the problem.

For your dog, I would recommend stool, blood, and urine tests. This combination may lead to an answer. If not, you may need to follow up with X-rays and ultrasound.

Unless you know what is causing the problem, you will face an uphill battle to eliminate your pet’s symptoms.

See related Vet Blog entries: