Re: Female going into heat
Some females are really clean, but usually you will see some drops of blood. The male will generally start paying more attention to the female, grooming her, laying next to her, etc.
If it looks like his nose is connected to her hind-end, it may already be too late, but separate them anyway.
Do not trust one crate. Crate both the male and the female. Then when you are there let one out for a while, crate the other. Then switch. It is an inconvenience, but well worth it. Consider it boot camp. Trust me on this, that keeping the male and female separated is a whole lot easier than whelping and raising a litter.
Your baby needs to be protected right now, as she is really not old enough to go through all of that. Instead, take her to classes and work on her titles. It will give you that much more to offer your new puppy buyers if you title your dogs prior to breeding them. It sounds like you have 18 months or more to do that in. It is not a bad time to get involved with a GSD or all breed dog club. You will learn a lot and be kept up to date for dog-related issues.
Good luck. Please do not let an accident happen. If you do not think you can keep them apart, board one of them.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.