I would perhaps bring up the other pets that she's not taken care of properly, urge her to do a lot of research, or perhaps even "accidentally" leave a few rabbit caresheets up on her computer
If you tell the adoption lady you have snakes, she's not likely to give you a rabbit, but that also may reflect poorly on you in her eyes. After all, to her you'd just be some weird person with snakes that wants to buy someone's cute fluffy pet bunny and feed it to your snake.