Cat Hyperthyroidism (Overactive Thyroid) Symptoms and Treatments Written by WebMD Editorial Contributor Medically Reviewed by Kathleen Claussen, DVM on January 16, 2025 ...

The thyroid is the largest endocrine organ in the body. Canines and felines both can suffer from impaired function of the thyroid gland (hyperthyroidism and hypothyroidism), which influences the ...

A small portion of cats might experience decreased thyroid hormone levels. If this occurs, they will need supplementation for an extended period or life. There are no side effects for I-131.

In the past, surgical removal of the thyroid gland was done but for the most part that is no longer done. Another option was a radioactive iodine treatment of I-131 that typically costs over $1,500.

Dear Dr. John, Ever since I got a new kitten last fall, my 14-year-old cat started to lose a lot of weight and so I had him checked. It was suggested that perhaps the food competition and stress ...

My car 13- to 14-year old cat Gator is eating wet food well. However, he is losing weight, sometimes throwing up and once, diarrhea. Gator is on medication for a thyroid condition.