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Overactive Thyroid in Dogs and Cats

Hyperthyroidism / Overactive Thyroid in Dogs and Cats

Herbal remedies to help address hyperthyroidism symptoms and may help to promote normal thyroid hormone levels in dogs and cats.

The endocrine system interacts with many organs and bodily systems, and the adrenal and thyroid glands plays a major role in providing critical trace nutrient support to all glands and tissue, and the adrenals can become stressed and fatigued, also affecting the heart, liver, duodenum, and kidneys.

Hyperthyroidism is an endocrine disorder that commonly affects the glands in an animal's body, typically resulting from an overproduction of thyroid hormones (mainly T4) from a tumor in the thyroid gland. Overwhelmingly, the tumor is benign, (97% of cases) and is referred to as benign (non-cancerous) adenoma.

The thyroid gland consists of two small lobes shaped like butterflies, located on either side of the neck. The thyroid gland produces the necessary thyroid hormones, thyroxine (T4) and triiodothyronine (T3) whose role is to regulate hormones and to maintain proper metabolic rate in your pet.   

When hyperthyroidism occurs, the thyroid gland becomes overactive and produces too many thyroid hormones, speeding up metabolism. As a result, excess cortisol builds in the blood over time. Cortisol normally helps the animal body to perform a number of important functions, including converting fat into energy, supporting balanced immune health and allowing the body to respond normally to stress. When excess cortisol builds up, it becomes damaging. 

When the thyroid gland is overactive, your pet may lose weight, have an increased appetite, an elevated heart rate, poor skin and coat conditions and reproductive and digestive imbalance. Behavioral changes may also occur and commonly include anxiety, nervousness, restlessness, depression, hypersensitivity and hyperactivity, stress as well as lack of focus.

Hyperthyroidism typically affects middle-aged to old cats and is rare in dogs. 

The common symptoms and signs of hyperthyroidism include:

Weight loss even with an increased appetite



Intolerance to heat

Dull, dry or oily coat accompanied by excessive shedding

Rapid/fast breathing

Increased water consumption and increased urination


Herbal Nutrition - (listed in order of relevance and recommendation by holistic vets  - human grade meets highest safety criteria for pets)

Herbal remedies are used to help promote and may help to maintain endocrine balance, especially thyroid health, in dogs and cats; may help improve thyroid function and may help to regulate and balance an overactive thyroid by providing nutritional support and for its effects to help balance hormones; may help to soothe the thyroid, heart & endocrine systems; may help to promote coritsol balnace as well as normal corticosteroid, fluid and electrolyte levels; may help strengthen your pet’s immune system and may help maintain normal body temperature, proper metabolic rate, reproductive health and may provide overall support of endocrine system and normal thyroid function.

I AM A ROCK STAR - (learn more) helps to support and nourish the endocrine system; helps support adrenal gland health and response to stress and metabolic demand, supports glandular ability to rebuild and regenerate, promotes hormonal balance, regulates stress on liver, kidney and digestive functions by reducing thirst and excessive elimination, promotes cognitive function and memory performance, balances blood sugar levels, for natural energy in young and geriatric pets, increases muscle use, ability and stamina, provides anti-inflammatory and immune support, helps maintain healthy adrenal, central nervous, digestive, immune and reproductive systems.

Dog & Cat Kryptonite (learn more) supports hypothalamic-pituitary adrenal (HPA) function, enables the body to respond normally to stress and metabolic demands while supporting the glands' ability to rebuild and regenerate, supports healthy energy levels and vitality, promotes cognitive function and memory performance, for lethargic, aging or convalescing animals, regulates the organs which secrete hormones, including the pituitary, parotid, thyroid and adrenal glands, the pancreas, and the testes; stimulates the hypothalamus, supports endocrine function, the central nervous, digestive, immune and reproductive systems.

I Feel Good –  (learn more) promotes healthy immune response, reduces all types of inflammation, provides dermal support and growth of healthy cells and tissues in the body’s natural defense mechanism, reduces the histamine trigger for contact allergies, seasonal and chronic allergens, pathogens, skin rashes, infections, hot spots, inflammation, swelling, hair loss, itching and geriatria (dull coat, lethargy), for all types of arthritis, including Degenerative Joint Disease, Osteoarthritis, Osteoporosis, Rheumatoid Arthritis (RA) and symptoms associated with rheumatism, including pain, strains, injuries, muscle pain, swelling and lack of mobility; plus contains prebiotics and probiotics useful in balancing digestive health and function and much more. Recognized as one of the most important medicinal plants of the whole world, particularly related to supporting balanced immunity and limiting inflammation and inflammatory conditions.

Yelp for Kelp - (learn more) provides critical trace nutrient support for the endocrine system, to energize the body, for building and toning enzymes, tissues, hormones and bones, for enhancing natural cleansing and detoxification, as an osteoporosis preventative, to promote immunity and for metabolic disorders, including the thyroid gland and other glands and tissues that affect the thyroid, for thyroid disorders, to cleanse the lymphatic system, to maintain healthy levels of TSH, T3 and T4, and for metabolic disorders.

Gland Candy - (learn more) contains healthy fatty Omega 3 acids used to support healthy body weight, used in the treatment of skin conditions and to promote healthy skin and coat, to support and tone the lymphatic system, to balance glandular activities including the thyroid, adrenal and pituitary glands, to support and maintain healthy thyroid function and to soothe the thyroid and endocrine system, for allergies, alopecia, allergic dermatitis, moist dermatitis (hot spots), to stimulate tissue repair and for all types of arthritis.

Helpful suggestions:

Feed your pet a premium, holistic, well balanced diet (free of corn, wheat, soy, chemicals and preservatives), which contains all the essential vitamins, minerals and nutrients. A home cooked or raw diet may be preferred. 

Provide fresh, filtered water daily.

Ensure that your pet gets regular exercise.

Help your dog or cat’s immune system with immune-boosting supplements.

Take your pet to the vet for annual check-ups and monitor any abnormal physical and behavioral changes.

Conventional Remedies:

The diagnosis of a thyroid problem is based on the symptoms, thorough physical examination and review of your pet’s medical history. Common tests include a Baseline T4 Test, Baseline T3 Test, or TSH Stimulation Test will be performed if hypothyroidism is suspected. 

The TSH Stimulation Test will reveal whether your dog has a low T4 or T3 level. If hyperthyroidism is suspected, the diagnosis is based on the symptoms presented, enlarged thyroid gland (large enough that it can be felt), and high T4 levels.

Tests such as a CBC, serum chemistry, and urinalysis are performed if symptoms of other diseases such as kidney failure, liver disease, diabetes mellitus or heart disease are present with hyperthyroidism.

Other tests known as the T3 suppression test, measurement of free T4 and thyrotropin-releasing hormone stimulation test may also be performed to confirm diagnosis.

Your vet may recommend the following standard treatments for hyperthyroidism in felines which include radioactive iodine (I-131), anti-thyroid medication such as methimazole (tapazole) or surgery (thyroidectomy). These treatments have serious side effects such as liver damage, anemia, hair loss and lethargy, and cats with this problem should be kept away from pregnant women and children.



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