Derek,
First, congratulations on being such a businessman at such a young age. Drive, determination and guts are rare at just 15. My daughter is 15 and she is quite the little entrepreneur herself, I love seeing it. You're going to learn a LOT from this experience that I'm sure will help you be even more successful in the future.
That said, you really need to find someone to proof-read and edit your site for you. You have a LOT of grammatical errors, misspellings, poor sentence structure, etc. I wouldn't expect a teen to have all that down perfectly, but if you are going to present yourself in a professional manner, you really need to get on those details. There are many people who would change their mind about purchasing from you just by seeing how many errors are on your website -- it doesn't come off professional at all. I don't want to discourage you at all, rather to encourage you. It's amazing that you've pulled it together this far alone! You should be congratulated.
I do agree with some of the other posters here that starting slow is better. I've been an entrepreneur my entire life and own 2 businesses now and am starting another this summer. Successful businesses. And having been someone that started young, in high school like you, one that I can tell you is that I never regretted taking my time and doing less than I planned on... but I always regretted doing too much. You can always ramp it up after you test the waters. A sure sign of immaturity (and in business, poor judgment) is being too excited and doing too much, too soon.
I wish you the best of luck in your endeavors and I hope that your babies are healthy, happy and go to good homes. Take your time, keep researching and learning and always put the health and well-being of the animals first.
Good luck!