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Why is my senior cat losing weight and vomiting with normal bloodwork?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 16 years and 10 months old

hello, my calico cat is 16 years old. up to last year she weight 17 pounds and now she is down to 4.. accoriding to my veterinarian her blood work is normal, her lungs are clear, her hearth is good, no discharge from eyes or nose , no ear infection her thyroid is a bit low but he said it is only 2 points which is nothing much to be overly concern but will check again soon, she is on prescribe diet yet she vomits a lot.. any ideas or help will be appreciated very very much.. helen kotur

1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on November 6th, 2016

Poor Checker! This is a huge amount of weight to have lost in a year, so I would say that something is definitely wrong. In older cats with significant weight loss like this and normal blood work, the most common possible causes would be an intestinal absorption issue like inflammatory bowel disease (which can be present even if she is not having diarrhea), or some type of abdominal cancer. The next diagnostic steps would be abdominal x-rays and ultrasound, with exploratory surgery and intestinal biopsies if needed to get a definite diagnosis. If this isn't possible for financial reasons, a trial course of oral steroids and injectable vitamin B12 might be helpful - I would suggest discussing these options with your vet to see what he/she recommends.

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