A curious domestic she-goat follows with interest the viewer. Goats are extremely curious and intelligent. They are easily trained to pull carts and walk on leads. They are also known for escaping their pens. Goats will test fences, either intentionally or simply because they are handy to climb on. If any of the fencing can be spread, pushed over or down, or otherwise be overcome, the goats will escape. Due to their high intelligence, once they have discovered a weakness in the fence, they will exploit it repeatedly. Goats are very coordinated and can climb and hold their balance in the most precarious places. They are also widely known for their ability to climb trees, although the tree generally has to be on somewhat of an angle. The vocalization goats make is called bleating.