Join Date: Nov 2012
Location: Albuquerque, NM
If the dogs are fighting when they go outside and that's the only problem, can you just shut the GSD in a room or something while you take the 7 y/o out, and shut the 7 y/o up when you take the GSD and 11 y/o out? That seems like it would allow you to potty train the GSD without needing to crate her.
If this is your brother's dog, how much responsibility is he taking for her? A 9 week old puppy really shouldn't be having free rein in the house just yet, because it will make it harder to train her. Most trainers I know recommend that puppies are either crated/confined when they can't be watched, or tethered/supervised in the house. That will make it hard for them to get into trouble or to have an accident in the house, and it will also solve your potty training problems I think.
I also think that you need to look at the underlying reason the 7 y/o is growling at her. If he's not just trying to play, that behavior will probably show up in other areas of their lives. At 9 weeks she can't do much to him, but as she gets bigger she'll be able to do a lot of damage without much effort. You should try to nip any problems between them in the bud by figuring out why he doesn't like her and either fixing it, or if it can't be fixed, figure out a way to keep them separated.
The rowdy dogs:
Hector-2 y/o GSD (mix?) rescue
Scooter-12 y/o ACD/Border Collie mix
Bandit-8 y/o ACD
Wooby-14 y/o ACD
Abutiu "Abi"-ACD puppy and hopeful future SAR dog!