Fillies/Mares Tying Up: Low Thyroid Levels?

Low thyroid levels, or hypothyroidism, is a common condition in horses that can lead to various health issues, including tying up in mares. Tying up, also known as exertional rhabdomyolysis, is a condition where the muscles become stiff and painful, and the horse may struggle to move or show signs of discomfort during exercise. In this blog, we will discuss the relationship between low thyroid levels and tying up in mares.

Thyroid hormones play a crucial role in regulating metabolism and energy production in horses. When the thyroid gland produces inadequate amounts of hormones, it can lead to hypothyroidism. This condition can result from various factors, such as iodine deficiency, autoimmune diseases, or congenital abnormalities.

Hypothyroidism can cause various symptoms in horses, including weight gain, lethargy, cold intolerance, and muscle weakness. It can also affect the horse's ability to exercise and perform at their best. In mares, hypothyroidism has been linked to tying up, a condition that is characterized by muscle stiffness and pain during exercise.

T ying up in mares with low thyroid levels is thought to be caused by a lack of energy supply to the muscles. Thyroid hormones are necessary for the conversion of glucose into energy, and when their levels are low, the muscles may not receive enough energy to function correctly during exercise. This can lead to muscle damage and the release of muscle enzymes into the bloodstream, causing pain and stiffness.

To diagnose hypothyroidism and tying up in mares, a veterinarian may perform various tests, including blood tests, muscle biopsies, and ultrasound examinations. Treatment options may include dietary changes, such as increasing iodine intake, thyroid hormone supplementation, and exercise modifications.

Preventing hypothyroidism and tying up in mares involves ensuring that the horse's diet is well-balanced and providing adequate exercise. Additionally, regular veterinary check-ups can help identify any underlying conditions early on, allowing for prompt treatment. In conclusion, low thyroid levels can lead to various health issues in horses, including tying up in mares. Understanding the relationship between hypothyroidism and tying up is crucial for horse owners and trainers to prevent and manage these conditions. Consulting with a veterinarian and implementing appropriate treatment and management strategies can help horses with low thyroid levels live healthy and happy lives.