What is a horse that refuses to leave group of other horses?

There isn't a specific term for a horse that refuses to leave a group of other horses. However, depending on the context and the reason for the refusal, we could describe the horse using different terms:

General terms:

* Social: This horse is highly social and has a strong bond with its herd.

* Loyal: The horse demonstrates loyalty to its herdmates.

* Attached: The horse is very attached to its group.

Terms related to specific behaviors:

* Hesitant: The horse might be hesitant to leave the group due to anxiety or fear of being alone.

* Resistant: The horse actively resists attempts to be separated from the group.

* Stubborn: This term is often used if the horse refuses to move at all, regardless of the reason.

* Protective: The horse might be trying to protect the other horses in the group from perceived threats.

Terms related to underlying reasons:

* Anxious: The horse may experience anxiety when separated from the group.

* Fearful: The horse might be afraid of being alone or encountering unfamiliar things.

* Dominant: The horse could be trying to maintain its position within the herd's social hierarchy.

It's important to understand the horse's behavior and the reasons behind it. This helps determine if there are any underlying problems like anxiety or fear that need addressing.