Hypothyroidism is a condition characterized by a deficiency of thyroid hormone production in the body. Thyroid hormones play a vital role in regulating various metabolic processes, including hair growth and maintenance. When a dog has hypothyroidism, the reduced levels of thyroid hormones can disrupt the normal hair growth cycle, leading to alopecia, or hair loss.
There are several ways in which hypothyroidism can contribute to alopecia in dogs:
1) Altered Hair Growth Cycle: Thyroid hormones regulate the growth cycle of hair follicles. In hypothyroidism, the decreased levels of thyroid hormones disrupt the normal progression of hair follicles through their growth phases. This disruption can result in hair follicles prematurely entering the resting phase (telogen) and shedding their hair, leading to patchy or diffuse hair loss.
A dog suffering from alopecia due to hypothyroidism.
2) Reduced Hair Regeneration: Hypothyroidism can impair the regenerative capacity of hair follicles. Hair follicles rely on a constant supply of nutrients and oxygen, which is regulated by thyroid hormones. When thyroid hormone levels are low, the follicles may not receive adequate nourishment, leading to a reduced ability to regenerate new hair.
3) Changes in Hair Quality: Dogs with hypothyroidism may also experience changes in the texture and quality of their hair. The hair may become dry, brittle, and more prone to breakage, resulting in further hair loss.
It’s important to note that while alopecia is commonly associated with hypothyroidism, it can also have other causes. Therefore, if you suspect your dog may have alopecia or any other health issue, visit AVCI for a proper diagnosis and appropriate treatment.
To diagnose your pet dog for hypothyroidism, AVCI performs the following tests:
1. T4 – P895/test
2. TSH – P990/test
Take note that a 10-hour fast is required for your pet before a thyroid test is done at AVCI.
