This week, we are shifting our focus to hormones in mares.
Many horse owners are eager to learn how to manage hormonal mares and better understand their behavior. While the most intense symptoms of hormone changes tend to surface in spring, chronic issues can persist year-round, making them challenging to handle, as hormonal imbalances can significantly alter their brain chemistry, behavior, and well-being.
As most women know, hormones are powerful and can cause severe symptoms. Unfortunately, horses cannot easily communicate what they are experiencing. So, today, I share tips on approaching hormonal issues with mares naturally and holistically.
Introduction to Hormonal Imbalances in Horses
Hormonal imbalances in horses, particularly mares and geldings, have become normalized in the industry. That has led to a lack of awareness about healthy hormone levels. The primary causes of hormone imbalances are stress, nutrient deficiencies, and toxicity, which disrupt homeostasis in the body.
Seasonal Hormonal Changes
In spring, increased daylight triggers hormonal changes in mares. Their eyes absorb more light, activating the endocrine system, including the hypothalamus and pituitary gland. The hypothalamus, known as the master gland, orchestrates these changes by stimulating various hormones in response to environmental factors such as temperature, fluid balance, hunger, and stress.
Hypothalamus and Pituitary Gland Interaction
The hypothalamus links the nervous and endocrine systems, receiving environmental information and eliciting a response by stimulating the pituitary gland with neural hormones. This complex interaction prepares mares for reproduction, producing follicle-stimulating and luteinizing hormones for estrogen and progesterone production in the ovaries.
Estrus Cycle and Hormonal Symptoms
A healthy mare experiences a 21-day estrus cycle, with ovulation around day 16 and heat lasting 4-6 days. However, many mares suffer from hormonal imbalances, leading to chronic heat cycles and symptoms such as uterine pain, colic, sweating, frequent urination, back pain, and general stiffness. These symptoms often go unrecognized as hormonal issues.
Behavioral and Emotional Impact
Hormonal imbalances also affect the behavior of mares, causing agitation, anger, depression, fatigue, and anxiety. That can impact their ability to cooperate with humans, making them unsafe and hard to handle. Recognizing and addressing the imbalances through nutrition and lifestyle adjustments can significantly improve their behavior and overall well-being.
Conventional and Holistic Approaches
While hormone replacement therapies are commonplace, they come with many side effects, including weight gain, uterine infections, and risks to human handlers. Medications like synthetic progesterone and medroxyprogesterone suppress estrus, but their risks often outweigh the benefits. A holistic approach focusing on diet, nutrition, and natural remedies is better for long-lasting results.
The Role of Stress and Nutrition
Stress significantly impacts hormonal balance, as elevated cortisol and insulin levels disrupt the physical equilibrium. Nutrient deficiencies, particularly vitamin B6 and magnesium, contribute to hormonal issues. Essential fatty acids, calcium, and Vitamin B12 will also support hormone regulation and overall health.
Protein and Alfalfa
Excessive protein intake can lead to behavioral and anxiety problems in horses. While protein is essential, horses do not require as much as some owners might think. Be cautious with alfalfa, a high-protein forage, and ensure it is relevant and appropriate for your horse.
Commercial Feeds and Hormone Impact
Commercial feeds can contain various...
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