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Hyperthyroidism in Dogs and Cats

Hyperthyroidism 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). The primary function of these hormones is regulate and 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


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 naural immune-boosting supplements.

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

Keep a daily or weekly health journal to track any changes in your pet's behavior or health condition

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

Herbal nurition has been used for millennia to help promote and maintain adrenal health in your animal, may help to improve thyroid functioning and symptoms associated with thyroid problems, may help balance an overactive thyroid by providing, may help provide hormonal balance, may soothe the thyroid, heart & endocrine systems, adaptogen content may help regulate TSH, T3 and T4 hormone production, may help maintain normal corticosteroid, fluid and electrolyte levels, may help strengthen your pet’s immune, may help maintain body temperature, metabolism, fertility, and growth and may help support the endocrine system and normal thyroid function.

I AM A ROCK STAR - (learn more) may nutritionally help support and nourish the endocrine system; help support adrenal and thyroid gland health and response to stress and metabolic demand, help support proper HPA (Hypothalmic Pituitary and Adrenal) gland function, help support glandular ability to rebuild and regenerate, help promote hormonal balance, help regulate stress on liver, kidney and digestive functions by reducing thirst and excessive elimination, may help promote cognitive function and memory performance, may help balance blood sugar levels, may lend support to the pancreas in cases of dysfunction; for natural energy in all life stages of pets, but especially adult, senior and convalescing dogs and cats, may help increase muscle use, ability and stamina, may help provide anti-inflammatory and immune support, and may help maintain overall healthy adrenal, central nervous, digestive, immune and reproductive systems due to tonic, natural plant chemical functions.

Dog & Cat Kryptonite– (learn more) helps support hypothalamic-pituitary adrenal (HPA) function, helps enable the body to respond normally to stress and metabolic demands while supporting the glands' ability to rebuild and regenerate, may help support healthy energy levels and vitality, helps promote cognitive (brain) function and memory performance and contains critical trace nutrients and antioxidants which may be important preventatives for cognitive decline; may be especially useful for lethargic, aging or convalescing animals due to its amino acid and protein converting phytochemical content, may help regulate the organs which secrete hormones, including the pituitary, parotid, thyroid and adrenal glands, the pancreas, and the testes; may stimulate the hypothalamus and thyroid glands when underperforming; may help support overall systemic endocrine function, including its impact on the central nervous, digestive, immune and reproductive systems; for its support of cognitive (brain) function, particularly in degenerative conditions.

Dogs Love Maca – (learn more) is a highly specialized super food and adaptogenic herb that may help identify metabolic, environmental, emotional and oxidative stress in your pet (may be used for dogs and cats) and may nutritionally help restore whole body balance in cases of dysfunction; used holistically to help address both Cushing's and Addison's as well as hypothyroidism due to its adaptogenic plant actions to bring gland and hormone production into balance; nutritive, contains atural plant phytochemicals which may help nourish gland health, support proper hormonal response throughout the body, may help counteract adrenal fatigue and may be particularly useful in supporting TSH, T3 and T4 hormone production; may encourage cellular health throughout the body related to gland health; may help regulate stress response and helps support proper metabolic rates, along with cognitive, cardiovascular and reproductive support; tonic in nature, may help tone and strengthen all body systems to help achieve optimal wellness, particularly as it relates to building and maintaining energy, focus and overall system balance.

CATS LOVE SUMA (learn more) is a whole food organic meal topper, to help “top off” your cat's nutrition, formulated to help bring all body systems into balance; may help optimize health; may help identify metabolic, environment, emotional and oxidative stress in your cat; may help regulate gland function, especially HPA function, affecting the hypothalamus, pituitary and adrenal glands; may also provide nutritional support to the thyroid and parotid glands; may help address nutritional deficiencies and exert a rejuvenating and restorative effect, with special emphasis placed on endocrine, nervous, digestive, cardiovascular, immune and reproductive system functions; may help promote proper nutrient assimilation, balanced immunity as well as may help foster resistance to infection and disease. Suma may positively affect your cat’s energy, vitality and endurance and may help optimize overall wellness.

I Feel Good –  (learn more) contains plant based adaptogens and is a potent plant-based anti-viral, which helps nutritionally tone the animal body, helps boost or balance immunity as needed, including soothing an over-stimulated immune system or boosting an under- performing immune system, helps to reduce all forms of system-wise metabolic and oxidative stress that undermine immunity; helps support water regulation and fluid balance in the body; helps reduce all types of inflammation, provides dermal support and growth of healthy cells and tissues in the body’s 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) and fever; may be an important anti-viral adjunctive in cases of Herpes virus; may help alleviate symptoms 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 mobilityreduces all types of inflammation, particularly from the heart to brain; as a gastrotonic to support stomach health; contains prebiotics and probiotics useful in balancing digestive health and function plus much more. Recognized as one of the most important medicinal plants in the world, particularly related to supporting balanced immunity and limiting inflammation and inflammatory conditions.

Yelp for Kelp - (learn more) provides critical vitamins, amino and fatty acids and trace macro and micronutrient support for the endocrine system, to energize the body, for building and toning enzymes, tissues, hormones and bones, for enhancing natural cleansing and detoxification, to help nutritionally support a balanced immune system; to help support healthy skin and coat;  to help balance digestion; 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. 


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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