Males can become aggressive, territorial and frustrated. Neutering should take place before adulthood, preferably around 6-9 months of age. Capybara can be taught some tricks and how to walk on a leash. These can be trained to do various tricks for food rewards. They can be affectionate and extremely clean in their toilet habits.
Young capybara can become very tame, and can be trained to walk on a leash like a dog.
A flat nylon choke type collar works the best. They are very receptive to 'neck corrections' but they move slowly and deliberately. Do not expect a fast paced hike when working with them. You can teach them tricks, such as sitting up to beg, climbing stairs, and more. Enclosures for captive animals should be strong enough, especially where the fence meets the ground to prevent escape.