I wouldn't really recommend letting your bunny and piggies share floor time. Rabbits can accidently hurt a big very easily, even simply by being happy and binkying around. We've unfortunately seen our fair share of guinea pigs and rabbits who were "best buddies" up until the pig was kicked into the wall by the rabbit and paralyzed or killed.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry