Here are some factors your vet will consider:
* Your mare's individual temperament: Some mares are more prone to aggression or restlessness during heat, making it safer to keep them in a controlled environment.
* Your mare's health: Any pre-existing conditions or injuries could influence the decision.
* Your farm's environment: The presence of other horses, fencing, and access to pasture all play a role.
* Your goals: Are you breeding your mare or are you trying to prevent her from being bred?
Here are some general considerations:
* Safety: Keeping your mare in a stable can help prevent injuries or accidents, especially if she's prone to being aggressive or restless during her heat cycle.
* Social interactions: Keeping a mare in can help minimize unwanted attention from stallions or geldings, which can be stressful for both the mare and other horses.
* Hygiene: Keeping your mare in can help prevent her from rolling in mud or dirt, which can be messy and potentially harmful to her coat.
However, there are also some potential drawbacks to keeping your mare in:
* Limited exercise: A mare confined to a stable may not get enough exercise, which can be detrimental to her health and well-being.
* Boredom: A mare who is not used to being kept in may become bored and frustrated, which can lead to destructive behaviors.
* Stress: The confinement of a stable can be stressful for some mares.
Always consult with your veterinarian before making any decisions about your mare's care. They will be able to assess your individual mare's needs and advise you on the best course of action.