Copied below is Centro's policy for animals on its buses 

"Centro permits service animals on its buses for persons with disabilities. Centro bus operators are authorized to ask customers if the boarding animal is a pet. If the passenger responds that it is not a pet and indicates that it is a service animal, the passenger will be allowed to board with their animal without further question or delay.

 

Pets are also permitted on Centro buses as long as they are in a carrier; however, if the pet is disruptive and acts aggressive then the bus operator can ask the passenger to exit the bus with their pet." (copied on 9/6/18 from  https://www.centro.org/about-Centro/faqs)