I teach a Bunny Basics class in Ann Arbor. Due to vastly improved nutrition information and advances in rabbit vet care, we say bunnies used to live 3-5 years, but that now a bunny living inside the home live 7-11 years.

My rex girl is 7 and is very active and spry. We have many older bunnies at our sanctuary that range from 6-11 years old.

Bunnies who live outside seldom do as well unless thay have exceptional housing. But even then their need for human interaction is usually not met.

So, long life for a bunny depends a great deal on what the bunny is fed, it's genetic nackground. that it is well taken care of, lives inside and gets a lot of exercise outside of the cage.

Hope this info is helpful.