
My sister bought the same cross of Rottweiler / GSD. Luckily she knew a bit about dogs and training. The dog oddly enough did not grow to a huge size, probably because of the poor rearing. She kept in touch with one or two other puppy owners which she met at the "breeders" , so we know what happened to at least three of the puppies. One ended up being put down at a year old as the owners could not cope, and the final straw was when it bit the postman! Another had a digestive problem which she was told the GSD sire had, after she had her puppy. It died at 2 years. Of the remaining one owned by her friend it grew to be huge, and she ended up not walking it as she could not handle it, so it ended up staying in the house and garden. My sisters pup lived a long life and was no trouble, until somebody tried to break in, after which it would follow people entering the house and would growl at them although never actually did anything. As soon as the person spoke and offered a hand to be sniffed he would go and lay in his bed, quite happy. Once when out he did get very funny with a youth, and my sister thinks he was protecting her, what did that dog know that she didn't?
My sister did comment frequently that he was definately a dog she wouldn't have trusted unless well trained and kept up to the mark in this area. He was 14 when he died and she missed him very much. She now has a red and white staffie, called Charlie Bean.....