Whether your German shepherd/Rottweiler puppy was bred deliberately or is an adorable accident you have rescued from a shelter, you have a very cute puppy on your hands. Depending on how much of each parent she shows, your pup is probably very fluffy, with ears that flop or prick partway. She is a big puppy, with paws that promise a huge dog is coming. Rotties top out around 100 pounds, and shepherds aren't known for being much smaller. While your particular pup may have gotten breed characteristics more from either of her parents and show more Rottie or Shepherd traits, both these breeds have strong instincts for herding and protection, and both are breeds that are loyally devoted to their families. Because of the similarities between your pup's parent breeds, you can have certain physical and behavioral expectations, whichever breed your pup expresses more.
Since both Shepherds and Rotties are known for their protective instincts, it is extremely likely that your puppy will show these instincts as she grows up. For this reason, it is essential that you socialize your puppy very well with people and other animals. If you intend for your "Shottie" to guard your livestock, property, or family, it best that you start protection training early, and acclimate your puppy to the livestock she will guard, as well as beginning to build in her aggression towards predator animals. If you have cats or other small animals, it is very important that you teach your puppy how to behave with small animals and resist her prey drive.
Get to know what motivates your Shottie puppy and begin using rewards to motivate her in training from the beginning. Your puppy is developing a powerful jaw that will benefit from gentle tug games, as well as as many chew and food distributing toys as you can afford. Teach your puppy not to jump up or throw her body around when she is small and harmless, so that as she grows she will not injure anyone accidentally. Rotties and Shepherds are both powerful, fast-growing dogs. Too often their body grows quicker than their self-control, making them hard to handle and potentially dangerous at around nine months. Every week of your pup's young life is essential training time to develop her into a happy, well-mannered adult.