• Cat

    Restoring Health & Happiness

    to Hyperthyroid Cats Since 1992
    Learn More

  COVID-19 Response

Although we’re all breathing a sigh of relief as the vaccine is more available and seems
protective, the virus is still present, variant strains present more uncertainty, and not all people are vaccinated or will be.

If you are unwell, have flu-like symptoms, and/or are or have been exposed to anyone who has tested positive for COVID-19 within 14 days prior to your cat’s appointment, please let our staff know. We can keep your appointment, however, we will implement curbside service for your visit and ask that you remain masked any time you interact with our staff.

Thank you for your support as we care for your cat!

Offering the safest, most reliable treatment for Feline Hyperthyroidism

Cat

Hyperthyroidism is the most common hormonal disease of cats resulting from excess thyroid hormone, which puts significant and potentially fatal stresses on the body. Radioiodine therapy, also referred to as I-131, is the safest and most effective therapy available. It's less risky than surgery, as it is generally a one-time injection and does not require medicating your cat daily for years. Most cats stay a couple nights before returning home — happy and healthy.

Essential Reading (before your appointment):

Learn More

New Patient Center

Online Forms

Essential Reading

What To Expect

Alternative Payment Options

Care Credit

Trupanion

ScratchPay

Contact

  Contact Us

  Appointment Request

  Send Feedback

Testimonials

As a member of an animal rescue organization on Vashon Island (VIPP), as well as being a chronic cat owner, I've had many opportunities to visit the Feline Hyperthyroid Treatment Center. Over the past... read more

Piro Kramar. Vashon Island Pet Protectors
Vashon Island, WA

My family has had Lila since she was a kitten. She is turning 15 in October, I was only 10 when we got her. I moved away as an adult for a few years... read more

Lila
Shoreline, WA

You took care of our Nina Kitty and it was like she found the Fountain of Youth! At age twelve, she had been slowly losing weight and getting a bit more "yowly" but we... read more

Nina

Hello! Just wanted to let you know Rio Blanco is doing great! As soon as we got home he started emptying the bowls of food! I haven't even opened the anti-nausea or the... read more

Patrick and Rio

Thanks to Dr Faythe Vaughan, and her kind staff in Shoreline and Tacoma for giving us at least 5 extra, good quality, years with our buddy, Rocky! He was a rescue cat to begin with, and his good... read more

Rocky
Tacoma, WA

Ripley (kitty) and I just wanted to thank Dr Vaughan and the whole staff for your great service and care. You were all great to work with, and communicated well with us! Ripley left... read more

Kali & Ripley

Monty is 12 years old. Dr. Vaughan had been monitoring Monty’s thyroid over the years and identified that he was borderline for hyperthyroidism.  After discussing his overall appearance, behavior and appetite, we decided that... read more

Monty

Will & Grace found me in 1999 when they were four weeks old. They were born near in a parking lot off Highway 99.  They are twins and do everything together.  This year they celebrated their... read more

Will, Grace, and Hunter
Edmonds, WA

My cat was diagnosed as hyperthyroid when she was 10. We had her treated as soon as she was diagnosed and I was glad it was found early. I didn’t really give the thyroid... read more

Savannah
Lynnwood, WA

Princess started losing weight and after checking with the vet she was confirmed as being Hyperthyroid. After Approximately 13 months of of a paste-like med applied to the ears, switching from left to right... read more

Dr. Vaughan; Kathy; Miranda; and anyone who was involved in treating and caring for Tigger. Just wanted you to see the life Tigger is leading because of your excellent care on this upcoming anniversary... read more

Pepper

Great place. They were so good to my kitty who was really scared. He seems to be completely cured. read more

They are very personable, professional, and knowledgeable about their very specialized practice. If you have a cat with thyroid issues, I highly recommend this clinic. read more

Becky
Seattle, WA

I wanted to drop you and everyone at FHTC a note to let you know that Byron (the PAWS™ kitty FHTC treated pro bono earlier this year) was adopted last month! Even better, he... read more

Byron
Seattle, WA

We want to thank you for your extraordinary efforts in looking after our Samson's well being. You took the initiative of a problem we were not aware was even present. We are very, very... read more

Samson
Port Townsend, WA

Pox's Story Does it make sense to treat hyperthyroid in a fourteen-year-old, mostly outdoor cat? That’s what we were asking ourselves in the summer of 2013. Pox let me know his opinion by following me... read more

Pox
Seattle, WA

Three months ago my 13 year old kitty Miss Fanny spent three days in the care of Dr. Vaughan and the staff. Before treatment she had been losing weight, getting more lethargic and her... read more

Miss Fanny
Northbend, WA

View All Testimonials