Switching from jumbo rats to rabbits?

I have a ritic, RT boa, and an albino burmese that are all big enough to go to raBbits. Is there a process in introducing them to rabbits? I've tried putting a rabbit but they all turned from it. The albino I put a rabbit and he turned from it so I took it out and put a rat and he took it no problem. So what should I do cuz I can't afford 5 rats a feeding per snake lol. Oh I even got one rat and rubbed it all over the rabbit hoping the smell of the rat would stick to the rabbit but again no luck. Urgh!! What next guys