19203 Aurora Ave N
Shoreline, WA 98133
(206) 546-1243


5506 Pacific Avenue
Tacoma, WA 98408
(253) 471-9200

Restoring Health & Happiness to Senior Cats Since 1992

Restoring Health & Happiness to Senior Cats Since 1992

Making An Appointment


We reserve a spot for the treatment on the same day as the 30" consultation with Dr. Vaughan to reduce car trips for your cat. However, if you prefer to schedule the consultation only, we are happy to accommodate that request. Appointments are offered on Mondays and Thursdays in Shoreline and, in Tacoma, three Tuesdays each month. Our physical exam and review of your cats' medical records help determine whether your cat is a good candidate for 131I treatment, and if so, what dose will be best. A family member or someone that lives with the cat needs to be present during the consultation. 

If your cat is arriving by air, we will want him/her to arrive no later than the day before treatment. We will give you the phone number of a courier service which you can call and make arrangements to transport your cat to and from the airport. An additional fee will be charged by the courier company.

We heartily recommend using the WAZE navigation app. on your Smart phone. This free phone application gets all of us to work on time! It will provide the fastest route and warn you about road hazards. Just enter our address and press GO.

Why Does My Cat Need To Be Scheduled at a Specific Location (Shoreline vs. Tacoma) ?

The Shoreline office, our original location, has more staff and longer hours, therefore will examine and treat all cats that fall into the following categories:

  • Cats that are considered "medically fragile", i.e. have additional illnesses effecting the heart, the kidneys, etc. which is more likely in senior cats
  • Feral cats or cats requiring sedation to be examined
  • Cats with a T4(thyroid hormone) level of 15 or higher
  • Any cat, no matter the dose

Our Tacoma office was established to treat cats in the Tacoma region that require low doses of radioiodine, i.e. a T4 level of less than 14.

What lab work is needed prior to treatment?

The following labs need to be less than 6 weeks old:

  • CBC
  • Chemistry Screen with Quantified T4
  • Urinalysis
  • Blood pressure (recommended but not required)

(if your cat is currently on Methimazole/Felimazole or y/d, please call before having updated lab work done.)

If Your Cat Is On Thyroid Medication:

Do I need to stop the antithyroid medications (Methimazole/Tapazole/Felimazole) prior to treatment?

Yes. They should be discontinued approximately 1 week before treatment. Exceptions can be made if your cat has serious cardiac disease. If this is a factor, you will be instructed by your veterinarian or by Dr. Vaughan. If your cat can tolerate being without these medications for longer, then discontinue them even sooner. The antithyroid medications may increase the uptake of radioiodine inito the normal thyroid tissue and increase the possibility of hypothyroidism after therapy. So, the longer they can be off these medications without compromising their health, the better.

Are there any medications or supplements I should avoid prior to therapy?

As previously mentioned, Methimazole(Tapazole/Felimazole) should be stopped 7 days prior to the treatment.

Any supplements containing iodine, kelp (high in iodine), or are high in calcium or magnesium should be discontinued one week prior to therapy.

We have had some treatment failures in cats on holistic/herbal nutritional supplements, therefore we ask that supplements and additives not be given for 1 week prior to, and after. Continue all prescriptions i.e. antibiotics, heart medication and/or flea products as directed by your veterinarian.

  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 coat was much too dry. She was found to have two... read more »

Miss Fanny
North Bend, 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 grateful to all involved in Samson's case. We appreciate the detailed... read more »

Port Townsend, WA

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 15th birthdays and are thriving in excellent health due to the... read more »

Will,Grace,and Hunter
Edmonds, WA

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