Ok I'll try to help if I can!!

I, personally, think the intro needs work.....I had to do a senior project in school, and we HAD to have a good intro! We had to start with a shocking statement, joke, or just something to get the audiences attention! I'd look around for maybe some statistics...maybe about the amount of dogs put to sleep in shelters or something..not sure, but you need an "Attention Grabber!"

I'd put 10-15 years on the age.....it seems pretty common for dogs to live past 12, especially small dogs. I think when you say:
What kind of dog you should get depends on what breed of dog fits your life style you should give examples of this..say like....Do you like to go for walks every day and play sports? An active breed like a labrador would be best for an active family. If you'd rather spend your days watching tv at home...maybe a dog with less exercise requirements would be best for you! You must also take into consideration your living arrangements. A family with an apartment would be better with a smaller dog, while a family with a house and a large backyard might like a bigger dog. I don't know if I'd go into the details about pit bulls either.

When you do finally purchase a dog you will want to make sure you spay or neuter it! What a great time to go into the benefits of spay and neuter! I think you need to give more reasons! Let them know that it's not a risky surgery, it's common procedure...and it will prevent health problems (maybe you could give the example of Teddy?) Also it will make their temperament better (less aggressive males, less likely to run off, dont' have to go through heat in females) And it's NOT going to make them fat and lazy! So many people think this! If they will just *exercise* the dog, it won't happen!

This is what I really think you need to do:

Make an outline! It will help with organizing your ideas. When you figure out your outline, decide what the main topics of your speech will be. Mention these topics in the intro. Talk about them in your speech the same order you said in the intro.....try to keep on track.

Anyway, I really think it sounds great so far! I'm looking forward to hearing the 2nd half of your speech!