You can show altered dogs in juniors if you co-own the dog. Showing in AKC juniors events is a great way to meet people who need an extra hand. You'll probably end up getting experience in the breed ring anyway if you're nice and curteous to people you meet.

And I'm sorry, but there is no way you can trick an AKC judge into not knowing she's spayed. If you knew so much about conformation, you would realize how stupid and wrong that would be to even try that. It's an obvious difference to ME, so I can't imagine how it would be to someone who's had 30+ years in dogs.

You have no legal right to Lola, therefore you have no right to be upset. From the pictures I've seen of her, she didn't look like she was going to do much in the rottie ring anyway.