How long does your speech have to be? There is usually a time limit...
Will you be using PowerPoint? I find that is the most effective to method to deliver a speech because it basically puts all of your notes/points on the screen for you to talk about, as well as cheat off of if you forget what you were going to say.
 It would also be a great way to present some nice bunny-pics along with your points to adopt versus purchase.
Do you have a rescue or shelter near you that you could take a picture or two at? That might be an iffy thing to take pics there, but you could at least ask and be sure to tell the director that you will be mentioning/ "advertising" their rescue in your speech. I would also see if they have something small related to bunnies-- like a bunny-shaped eraser with the rescues name on-- that you could give away in class. People like free things, and it will help people remember your speech, and the rescues name, the most because you gave them something at the end. Trust me, it works....
myheart