Hypothyroidism in Pets

Hypothyroidism is a condition that mainly affects dogs (and people). It means there is not enough circulating thyroid for the body to use. Thyroid hormones play an important roll in the function of many body systems. Due to the wide impact of thyroid hormone, there are a range of symptoms that may be seen. Typically this condition is diagnosed in middle aged dogs, however younger and older dogs can be affected.

Thin hair is a common symptom (source for photo)

While there are a variety of symptoms that can occur, there are several that are most commonly noted. These include lethargy (or lack of energy), weight gain, trouble with their coat and heat seeking behavior. These are actually similar to the symptoms noted in humans as well. To focus a little more on the coat, the symptoms can range from hair loss, to a dull coat or the hair not re-growing after trimming. It can also include recurrent skin infections. Some of the less frequently seen symptoms include weakness, facial paralysis, and even seizures. Additional problems to note in dogs can include ocular problems such as glaucoma. This can occur secondary to the extra triglycerides that circulate in dogs with hypothyroidism. They can cause a blockage of the draining of the eye which can lead to an increase in pressure. These triglycerides can also build up and cause some precipitation in the eye which can look like crystals. It is possible for pets to only have one or even all of these symptoms at once.

Source for photo

If your pet struggles with any of these your veterinary may recommend testing for thyroid disease. Diagnosing a dog with hypothyroidism involves more than just screening the circulating thyroid levels. It includes a blood test panel that screens for levels of many different thyroid hormones. Typically several abnormalities in this panel need to be present before a diagnosis can be made. This is due to the fact that circulating thyroid alone can be low in pets that are just not feeling well but do not have a problem with thyroid disease. When there are several abnormalities however this is when we can accurately make a diagnosis and start treatment.

Photo Source

Hypothyroidism is managed, not cured. It will be a medication that will be given lifelong and typically require regular blood tests to assure adequate response. While the medication is similar to what humans would take the dosing is much different. It is very important if a person and a dog in the household are on medication for hypothyroidism that the prescriptions are not confused. Humans is MUCH SMALLER doses in this instance than dogs do. While the medication is well tolerated it is best not to get them mixed up to avoid any toxicity issues in humans or pets. If you have any questions about this condition please contact your veterinarian. More information can also be found at veterinary partner here.