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Ask Dr. Michael Salkin Your Own Question
Dr. Michael Salkin
Dr. Michael Salkin, Veterinarian
Category: Cat Veterinary
Satisfied Customers: 24468
Experience:  University of California at Davis graduate veterinarian with 44 years of experience.
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4 yr old cat always hungry, eats constantly 4 or more cans a

Customer Question

4 yr old cat always hungry, eats constantly 4 or more cans a day but losing weight.
Went from 14.5 lbs to 8.6lbs in 4 months
Been taking medicine for thyroid for 3 months, no change
Cries for food. HELP!!
Submitted: 4 months ago.
Category: Cat Veterinary
Expert:  Dr. Michael Salkin replied 4 months ago.

While the youngest cats diagnosed with hyperthyroidism were 4 years of age, if you haven't seen a response to methimazole in 3 months, hyperthyroidism isn't the likely cause of your cat's polyphagia (increased hunger). The differential diagnoses for such a patient are diabetes mellitus (easily ruled out with a blood sugar test), Cushing's disease (very rare), and malaborption due to either severe inflammatory bowel disease (IBD) or small cell lymphoma in the gastrointestinal tract. My next diagnostic of choice for your cat would be an abdominal ultrasound looking for the inflammation associated with either IBD or lymphoma.

Do you recall what your cat's T4 and fT4 were prior to initiating methimazole therapy?

Expert:  Dr. Michael Salkin replied 4 months ago.
Hi,

I'm just following up on our conversation about your pet. How is everything going?

Dr. Michael Salkin