As winter begins to loosen its grip and daylight slowly increases, many owners start to notice familiar changes in their mares. Behaviour shifts. Sensitivity increases. Work becomes inconsistent. What felt like a settled, rideable horse a few weeks ago can suddenly feel distracted, tense, or reactive.
This is not bad behaviour and it is rarely “just attitude”.
Late winter is when hormonal changes quietly begin before spring is fully visible. Understanding what is happening, and supporting your mare through it, can make a significant difference to her comfort, performance, and wellbeing.
Signs of Hormonal Sensitivity in Late Winter
Not all mares react the same way, but common signs of hormonal sensitivity include:
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Mood swings or sudden irritability
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Tension through the back or reluctance to go forward
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Increased sensitivity to leg or contact
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Changes in appetite or droppings
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Discomfort around the girth or flanks
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Reduced focus or willingness in work
These changes often appear before clear seasonal cycling is obvious. Hormones are already shifting, even if spring still feels weeks away.
Hormones, Stress, and the Gut Connection
Hormonal fluctuations can increase stress sensitivity, and stress has a direct impact on gut function.
A stressed or unsettled digestive system can amplify behavioural changes. Discomfort in the gut may present as tension, resistance, or reactivity under saddle. This is why some mares seem both hormonal and unsettled at the same time.
Routine disruption during winter, changes in forage, and inconsistent work patterns can all contribute. Supporting both emotional balance and digestive stability is often key.
Practical Management Tips That Help
While feeding support plays an important role, management matters too.
Keep routines consistent
Mares often cope better when turnout times, feeding schedules, and work patterns are predictable.
Avoid sudden increases in pressure
This is not the time to push through resistance. Keep sessions clear, calm, and achievable.
Build work gradually
Light, regular exercise supports hormone regulation better than sporadic intense sessions.
Watch subtle signs
Small changes in posture, expression, or willingness are often early indicators of discomfort.
If behaviour changes are sudden, severe, or accompanied by pain, veterinary advice should always come first.
Feeding Support for Hormonal Balance
Nutritional support can help mares cope more comfortably with seasonal hormone changes.
Agnus castus, also known as chaste berry, is widely used to support hormonal regulation in mares. It is particularly helpful for mares who become tense, reactive, or unsettled as their cycles resume.
Mare Formula is designed to support hormonal balance during these transitional periods, helping to reduce behavioural sensitivity and promote a calmer, more consistent outlook.
For mares who also show digestive sensitivity, pairing hormonal support with gut stability can be beneficial. Original provides daily digestive support and can help reduce stress related gut discomfort, which often overlaps with hormonal behaviour.
What to Expect and When to Start
Hormonal support is not an instant fix. Most owners notice gradual improvements over two to four weeks, with best results seen when supplementation starts before peak spring cycling.
Starting in late winter allows support to be in place as hormone levels rise, rather than reacting once behaviour becomes challenging.
Consistency is key. Feeding support works best alongside steady routines, appropriate workload, and realistic expectations.
Make Spring Easier on Everyone
Hormonal mares are not difficult. They are communicating discomfort, imbalance, or overload.
With the right management and targeted feeding support, late winter does not have to mean weeks of tension and frustration.
Make spring easier on everyone.
Shop Mare Formula today.