Thyro-Cat, LLP

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Feline Hyperthyroidism Treatment Admissions

Admission & Procedure Policies


Your cat’s pre-admission appointment will take approximately 15 minutes. We will answer any and all of your questions and you’ll let us know your cat's feeding pattern and likes and dislikes. To best prepare for this appointment, please:

  • Bring your cat in a carrying case, this is required
    (We can provide one at an additional cost if you don’t have one).

  • Have your cat checked for fleas/ticks before coming in
    (Use a veterinarian-recommended flea preparation).

  • Your cat can eat and drink normally prior to admission
    (You may bring food, treats, and few personal objects).

  • Any personal items cannot be returned due to radiation safety regulations
    (We reserve the right to limit the amount of material which can be left for a pet).


  • Your cat will receive one injection of the RadioIodine (I-131.

  • We will closely monitor your cat for health and radiation levels.

Feline Hyperthyroidism Treatment Aftercare

  • Your cat will be housed with us for 3-5 days
    New York state law mandates 5 days for some households.

  • Our centers are spacious, comfortable & climate-controlled
    We even have videos for your cat to enjoy!

  • You cannot visit your cat during its stay, per law
    We will call daily from our Thyro-Cat main office with updates.

  • We will call you to schedule a discharge appointment
    This will be done when your cat’s radiation levels are appropriate.

  • We can board your cat for longer if needed, at additional cost.

  • Following release, we will monitor your cat's reaction to therapy
    The referring veterinarian may interact with specialists as needed.

  • Owners will be given RadioIodine safety information
    This will include instructions on how to manage your cat's waste.

This one-time feline hyperthyroidism treatment is sufficient to normalize thyroid function in 98% of cases. However, if in the rare case sequential thyroid function assessments indicate persistent hyperthyroidism, or recurrence of the hyperactive state, then another course of I-131 may need to be scheduled if deemed appropriate.

To learn more about feline hyperthyroidism please visit our cat hyperthyroidism FAQs section. If you have any questions or concerns, please call Thyro-Cat.