When to get a new puppy with a maturing German Shepherd? What breed?

Bruno won't be fully mature physically and emotionally until he is at least 18 months to two years of age. That's because large breed dogs mature slower than the smaller breeds of dogs. But that doesn't mean you can't get a puppy now, and I would recommend having Bruno neutered before getting another dog. Unneutered dogs can and do become very territorial and aggressive when intact dogs enter their home, and that can cause a lot of problems for you to deal with daily. In addition, if you get a female, this can lead to unwanted puppies when she goes into heat.

GSDs are a very active breed, and if you have the time and energy to give both dogs all the exercise, attention, and training they need, there is no reason why you can't get another GSD.