Hypothyroidism is a pet’s inability to create enough of the necessary thyroid hormone, which results in a low-functioning metabolism. The disease is usually caused by a shrunken or inflamed thyroid gland, which commonly appears in middle-aged large dog breeds; hypothyroidism rarely occurs in cats and small dogs. On occasion, hypothyroidism is caused by a tumor that forcefully puts pressure on cells of the pituitary gland. In these cases, hypothyroidism can be life-threatening, thus seeking veterinary care is critical.

Most thyroid hormone deficiencies go unnoticed by pet owners because the symptoms appear gradually. By the time a new symptom onsets, an owner has already adjusted to a previous issue, not considering that the two could be connected and caused by the same underlying problem. If your pet is exhibiting any of the following symptoms, please contact our office to schedule an exam.

Symptoms of hypothyroidism: 

  • Droopy facial expression 
  • Dull coat
  • Hair loss or thinning of hair
  • Increased shedding
  • Intolerant of cold temperatures
  • Lethargy
  • Muscle weakness
  • Unexplained weight gain

Treating hypothyroidism in pets

Pets that are positively diagnosed with hypothyroidism undergo hormone replacement therapy and remain on synthetic hormones for the remainder of their lives. In certain instances, the veterinarian may also find dietary restrictions helpful for your pet as well, such as limiting fat intake. After implementing the supplements, most symptoms subside within a few months, and the veterinarian will determine if levels can be reevaluated or adjusted, though this isn’t certain in all cases.

For pets receiving hormone therapy it is important to note that pet owners should not administer any medications or herbal supplements without consulting the veterinarian first. Medications react differently with synthetic hormones and it’s best to inquire first in order to prevent any subsequent issue.

If you have any questions about hormone therapy or about hypothyroidism, feel free to contact our office at your earliest convenience.


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Here's a vet that still cares.
Just wanted to say I love Dr. Petcu's staff and his compassionate , caring way of taking care of my dogs.The staff is not only friendly and professional ,they know who you are when you arrive ,and they actually love animals. Is the first Animal Hospital that my dogs are at ease and feel comfortable.The place is very clean and the reception area very elegant and inviting. Exquisite services and Dr. Petcu always take his time to explain the disease and options and still finds time to play with my dogs. He's always treated both his animal and human patients with compassion and dignity,and would never recommend procedures unless he truly feels your pet will benefit from it. One of the vets that cares for your pet. The prices are reasonable and the services exceed all expectations. I Highly recommend Dr.Petcu and his hospital.

Reba S

Western Animal Hospital AMAZING! Western Animal Hospital is the best place in the valley .The staff is professional, friendly, caring and accommodating. The hospital is very clean and upscale. The customer service and the provided services are outstanding.Dr. Petcu is one of the most professional veterinarians that i have ever met in my 25 years of pet parenting. I drive across the valley just to see him( i live in Anthem) .He really cares about his animal patients and it shows in every visits . He is very knowledgeable , compassionate, friendly and always takes the time to answer any question i have and explaining in detail any situation we are dealing with. I had my share of visits to many animal hospitals in the valley but none of them had the last technology as Western - digital X-ray ( they send you home with a cd for you x-ray records ) every room has a computer monitor where the x-ray shows and Dr. Petcu can review with me every detail of it. Also they have the laser surgery and digital dental x-ray. Dr. petcu is one of the most
courteous and pleasant Vets I have ever met. The prices are more than reasonable and also they try to accommodate everybody. I cannot recommend them enough. You can rest easy knowing your pets are in their care.I STRONGLY RECOMMEND THIS HOSPITAL - THEY HAVE A CUSTOMER FOR LIFE IN ME! very good !

Betty K

Western Animal Hospital this doctor is making a lot of sense and will explain everything in details..
prices are great ....

.the best vet I met !! Pam M. 5 Western Animal Hospital - we are bringing our pets to Dr Petcu for 8 years. He was always helpful, many times we did not have the funds to treat our pets but he was fine with us paying when we had the money. He saved our cats in many instances and all I have to say is that I greatly reccomend Western Animal Hospital for any responsable pet owner .

Yolanda M

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