i understand pit bulls are dog-aggressive as well as same-sex aggressive, particularly the bitches.  i don’t know that i’d want to add another to the mix you already have going in your house.  it could upset the balance and cause problems.

She is rescue

I met the new dog 2 year old might not get along with the 6 year old I would keep the 6 year old Pitt with the golden and lab chow mix they get along fine but she probably wouldn’t get along with the new dog so I was going to keep the new dog by it self

I think you will get tired of this arrangement very quickly.  After a few day if one or two of the dogs think they need to get to the other dog(s) you will have a dangerous situation.  One second of not paying attention.  One visiting friend that doesn’t understand the consequences of opening a door and you will have an out-of-control situation.

And these are all BIG dogs.  You won’t be able to just pick up one of the dogs to end the fight.

I have fostered dogs that wanted to kill smaller dogs (one of my own dogs!).  Every precaution was taken — two doors/gates between the dogs.  The aggressive dog was harnessed and had to always drag a leash for me to step on (these were terriers that I could pick up to help end any aggression).  The aggressive dog was never allowed into the yard with the smaller dogs unless there were 2 handlers that were working with the aggressive dog (1 to work with the aggressive dog, and 1 to make sure the smaller dogs did not approach the aggressive dog).  

I finally got the aggressive dog to accept that MY small dog was not something for him to kill and they got to the point that they could all be in the kennel all day together.  BUT he was still willing to attack unknown small dogs on sight.

In the 6 months he was with me, even being as careful as I could be, this dog attacked small dogs four times.  Visitors opened a door that someone else left unlocked, the aggressive dog pushed down a baby gate that we thought was secure enough to hold him, he got over a fence that we thought was too high for him to climb, etc.  Each of the small dogs attacked were bitten and bloody — and they suffered PTS.  It was pure luck that determined dog never got just the right hold on the other dogs so that he could break their necks.  Cause that is what he was trying to do!

So, ask yourself how dangerous is the situation.  How sure are you that you can keep your dog(s) safe from the aggressor.  I have fostered over 30 dogs, several of which came to me as very aggressive dogs so I had experience.  And it was still very overwhelming for me at times.

I commend you for wanting to rescue another dog — just be sure you don’t endanger the new dog, or your own dog(s) in the process.

Good luck.

PK