Endocrine

Hyperthyroidism

Over-active thyroid gland producing excess thyroid hormone. The most common endocrine disorder of older cats, typically causing weight loss despite a hearty appetite, restlessness, increased thirst and a poor coat.

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Expert guides

Treating hyperthyroidism: the four options, compared honestly

When your cat is diagnosed with an over-active thyroid, you'll quickly notice that whoever you ask seems to favour a different treatment. That's not because anyone's being dishonest, it's because there are genuinely four good options, and the right one depends on your cat...

Claire Greenway9 min read

The over-active thyroid: why your older cat is wasting away despite eating everything

If your older cat is eating like never before and still getting thinner, it's natural to find that frightening. The most likely explanation is one of the most common things we see in senior cats, it's well understood, and it's very treatable.

Dr. Alastair Greenway7 min read

Living with a treated thyroid cat: tablets, gels, rechecks and the long game

Once your cat's hyperthyroidism is diagnosed and you've settled on a treatment, the day-to-day becomes quite manageable. If you've chosen medication rather than a one-off cure like radioiodine or surgery, this article is about doing that medication well over the years…

Dr. Alastair Greenway8 min read

The kidney catch: why treating the thyroid can unmask kidney disease

If your cat has just been diagnosed with an over-active thyroid, you'll probably have been told that it's common, well understood and very treatable. All of that is true. But one piece often gets left out of the first conversation, and it surprises owners...

Claire Greenway10 min read

Radioiodine: the one-and-done cure most owners aren't offered

Of all the treatments for an over-active thyroid, radioiodine is the one most likely to make an owner say "nobody told me that was an option." It cures the condition outright in the great majority of cats, with a single injection and no anaesthetic, yet plenty of cats are never offered it...

Dr. Alastair Greenway6 min read

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