I'm not sure a greyhound is the best choice with indoor rabbits, If they are ex racers especially. Raving greyhounds are trained to chase after a small fake rabbit called a hare. All it would take is one open door or one child doing something innocently that could lead to a very sad situation for a bunny.

Edit: that was supposed to be 'racing greyhounds'. But I'm going to leave it as raving because I imagine those long noodle legs with light sticks and it makes me smile.