Introducing a new horse to an existing herd of horses can be a challenge. But horse owners who take it slow and easy can ensure that no one gets hurt in the process.
Horses evolved in the wild as herd animals. They find protection in numbers, and each horse has a role and a place within the herd that is a key part of that survival instinct. Because of this natural hierarchy, new horses add uncertainty to what horses already know about their rank and place within an existing herd. New horses also could compete with the current herd for limited resources and pose a challenge to the existing herd sire.
So, horses in the wild worked out their own way of integrating new members, only welcoming those they came to trust through repeated introductions, proximity, and pair bonding.
The process of introducing new horses to an existing “herd” at a barn is essentially no different than the process that occurs in the wild. Just releasing a new horse into a field almost guarantees a fight of some kind and resulting injuries. Often, the dominant mare or gelding will chase the new horse and try to bite or kick it to drive it off. As the horse cannot escape, this behavior happens over and over again until a human steps in to separate the animals.
The Importance of Sequential Introductions
The best way to introduce a new horse to an existing herd is through a sequential process. First, the new horse should be put into a separate paddock or field with a fence that adjoins the pasture containing the existing herd. This allows the horses to touch noses and smell and see each other while protecting the new horse from kicks or bites.
If all is quiet after several days, the new horse can be “pair bonded” with one other horse from the existing herd. Determining which horse is appropriate for pair bonding is fairly easy. Owners can watch the herd to see which horse seems most interested in the new horse, is making friends over the fence line by touching noses, or is staying nearby to keep the new horse company.
By putting the new horse and a buddy together for a few days, owners can ensure that trust and connection is established. In a small herd, this process can be repeated over and over again, by introducing another member of the herd to the new horse and pair bonding over a period of weeks.
Eventually, the new horse can be put in the pasture with the existing herd, and fighting will be minimal.
Because the buddy horse will often stand between the new horse and more aggressive horses, the pair bond is essential in preventing injury to the new horse. Sometimes, even with a pair bond, a more-aggressive horse from the existing herd may be relentless in its bullying. At that point, the owner must step in and become “herd mare,” driving off the bully and re-establishing a healthy pecking order.
Resource Management
The other important safeguard is to ensure that there is plenty of food, water, and physical space available for the herd. A general rule of thumb for pasturing horses is a minimum of one acre per horse. When there is less than one acre per horse, fights for dominance and resources are sure to happen.
Introducing a new horse to an existing herd is an important process that cannot be rushed. Horses form deep bonds, and taking the time to ensure a new horse is bonded to horses in an existing herd will protect everyone from injury.
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