Best Shepherd Pup??

Question
I have two male Siberian Huskies and a SIberian Kitty cat. The oldest husky is 7 yrs and the youngest is 5 years old. They are father and son. My kitty is around 7 years as well, she was an adoption so we never knew her actual age. We did have three huskies but our female Nadia was stolen from our yard. Very painful for our family:( and her two boys. Ok so now there is a little background and to my question. My friend has a litter of beautiful white german shepherds and she is letting me have the pick of the four females. I need the pup to be gentle and not aggressive. My oldest husky (Dakota) does not respond well to aggressive animals and My kitty (Cheyenne) is my little house princess, declawed, and quite the Diva so I do not want to have the pup injure her in anyway. She has held her own with growing up with three huskies and accepts dogs pretty easily. My question is, what pup behaviors do I need to look out for in order to pick the right one for this situation. I have always rescued and adopted pets and never really picked out a pup. I have been researching over and over the net about this dilema, but no real clear answers.  I just need some short and clear answers on what pup is ideal for a home with a cat and two older dogs that will not turn out being a unpredictable psycho..LOL We have no children but we always have our nephews over and we have a huge backyard and always take our dogs to social settings, such as on the boat, to parks, to other freinds houses with dogs. The only problem we ever ran into was with our older dog being very protective around aggressive dogs. I was attacked by a aggressive pit bull 5 years ago, while grilling in my front yard, right in front of Dakota and ever since that day he acts extremely protective around any dog who shows aggression.

Answer
Hi

I would use process of elimination.   Take the 4 pups away from the rest of the litter and their mother, a room with a door you can close is fine.   Or in the yard with the other dogs out of sight.

Sit with the pups and observe them.  When they come to you, observe their reactions.   Any pups that won't come to you or seem fearful, put them out of the room.  Pick the one that when you pet her on the top of her head and down the back, sits with tail wagging and ears relaxed.   That will be the submissive pup and one that is probably willing to please.   Do this test at 49 days of age.   if possible.

Hope this helps!

Lori