1. Arabian: Known for their intelligence, agility, and stamina.
2. Morgan: A versatile breed known for their strength, intelligence, and willingness to learn.
3. Friesian: Famous for their elegant, flowing movement and dark, glossy coat.
It's important to remember that ethical treatment of animals is crucial. If you're ever concerned about the welfare of animals in a circus, research the organization and speak out against any cruelty.