A New Treatment For Hyperthyroidism!

We are still open during the different covid-19 alert levels. For specific information regarding our services in each alert level, please click HERE


Latest News

A New Treatment For Hyperthyroidism!
Mill Road Vet

A New Treatment For Hyperthyroidism!

It’s not often that something completely new comes along, but Hills Pet Nutrition have done it with Hills Y/D.


Hyperthyroidism is the most common endocrine disorder in older cats. (Have a look at “Mouse, a hyperthyroid cat” story on our website.) It is caused by a benign growth of the thyroid gland, which causes an overproduction of thyroid hormone. The hallmark symptoms are weight loss despite an increased appetite, and an increased heart rate. Ultimately death is often due to heart failure. Traditional methods of treatment are oral medication, surgical removal of one or both of the thyroid glands or radioactive Iodine treatment. Now we have another option!



The science behind Hills y/d is really quite simple. Production of thyroid hormone requires dietary iodine and that is the only known function of iodine. Hills y/d is a limited-iodine therapeutic food. Putting the theory into reality took Hills more than a decade of research and development. As well as the usual clinical studies to undertake, the challenge was achieving a consistently low iodine level, which requires extensive analysis of all ingredients for every batch. But they’ve done it.


Each treatment option has its pros and cons and concurrent disease further complicates the options. Thyroidectomy is curative but expensive and carries the greatest risks. Anti-thyroid drugs control the disease but require twice daily pilling. Radioactive iodine is safe but requires a stay in Auckland. Hills y/d is safe, easy to get into the cat and doesn’t have a big one-off cost. The main downside is that the cat has to eat y/d only.


If your older cat is losing weight, a great appetite may not mean he’s not sick: it could be another symptom! Hyperthyroidism is easily diagnosed with a blood test and if confirmed we then talk through all the treatment options and decide on the best treatment for each individual.

Previous Article Eve and her bladder full of stones
Next Article Attention all “unusual pet” owners!!
2529 Rate this article:

  • A heartfelt thank you to everyone for the care, help and compassion shown.

  • Just wanted to say a very heart-felt thank you for literally saving Bosca’s life.

  • Knowing our pets have always been in such a kind and caring environment, with such wonderful, capable people means so much.

  • You are a one in a million veterinary team!

  • You guys are super heroes!

  • You have made a stressful situation so much easier to deal with, with your friendliness and professional approach.